Added ios6.1 SDK support for Xcode 5
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Justin Spahr-Summers (14) and others
# Via Josh Abernathy (2) and others
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa:
  Fix RACObserve with protocols.
  Supply name to signal for selector
  Remove NSObject * type
  ffffuuuuu
  s/str/original
  Collapse all whitespace at once
  Override rac_description for basic value classes
  Omit "name:" string from signal descriptions
  Combine signal name and address
  Better descriptions with signal and subscriber addresses
  Do a better job of cleaning up whitespace
  Rename folder and add a README
  Add Instruments template for tracking signal events
  Get legit
  Add DTrace probes for signal events
  Playing around with simple DTrace probes
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Dave Lee
# Via Dave Lee (1) and Justin Spahr-Summers (1)
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa:
  Header Shit Work
  Add ex-RACExtensions to ReactiveCocoa.h
  Sort Foundation Support group
  mv RACExtensions/* ReactiveCocoaFramework/ReactiveCocoa
  Make RACExtension headers public
  Add RACExtensions to product targets
  Remove RACExtensions from test targets
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Justin Spahr-Summers (18) and others
# Via Justin Spahr-Summers (6) and others
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa: (26 commits)
  Make the connection signal cold instead
  Add RACified NSURLConnection loading category
  Add RACCompoundDisposableProvider.d to Mac static library target
  Comment nitpick :trollface:
  Fix stillHasSubscribers check after removal
  Go back to an array, but start the capacity at 1
  Add another disposable to +compoundDisposable… test
  Build EXTRuntimeExtensions into static library too
  Fix link to Parallelizing Independent Work in README
  Replace reference to RACBind with RACChannelTo
  Fix OOB array access in -initWithDisposables:
  Optimize disposable usage in base signal operators
  Remove -didSubscribeWithDisposable: for passthrough
  Refactor _subscribers into a singly linked list
  Inline 2 disposables into RACCompoundDisposables
  Instruments template for compound disposable growth
  Add DTrace probes for compound disposable growth
  Use two -initially:'s in example
  Now with 0.1% better succinctness
  Slight rewording of example comment
  ...
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Kent Wong (3) and Justin Spahr-Summers (1)
# Via Justin Spahr-Summers
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa:
  Minor style tweaks
  Modifications as requested by jspahrsummers:
  - Removed UICollectionViewCell+RACSignalSupport.h from ReactiveCocoa.h because this category applies to iOS >= 6.0 and the apparent minimum version of iOS supported by ReactiveCocoa is iOS >= 5.0. - Adjusted UICollectionViewCellRACSupportSpec.m to account for known cases where prepareForReuse is never called in some simulator/device configurations.
  Add UICollectionViewCell.rac_prepareForReuseSignal
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Justin Spahr-Summers
# Via Josh Abernathy (1) and Justin Spahr-Summers (1)
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa:
  Use singletons for +return:nil and +return:RACUnit
  Turn RACEmptySignal into a singleton in Release builds
  Only build descriptions for +error: and +return: in DEBUG
  Import OSAtomic.h in RACDynamicSignal
  lmao if NSError actually supports <NSCopying>
  Move +createSignal: behavior into RACDynamicSignal
  Move +return: behavior into RACReturnSignal
  Move +empty behavior into RACEmptySignal
  Move +error: behavior into a private subclass
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Justin Spahr-Summers (6) and Keith Duncan (2)
# Via Justin Spahr-Summers (2) and Josh Abernathy (1)
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa:
  Test for +createSignal: disposing of inner subscriptions
  Test that RACSerialDisposable.disposable is released
  Use `CFBridgingRetain` in place of a cast and `CFRetain`
  Fix RACSerialDisposable leaking its set disposable upon dealloc
  Dispose of RACSubscriber.disposable regardless of whether a block is set
  Ensure passthrough subs dispose of given disposables
  Clear out RACSubscriber's blocks on disposal
  Fix ownership race condition when swapping disposables
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Dave Lee
# Via Justin Spahr-Summers (2) and Dave Lee (1)
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa:
  s/assumed/used
  Prevent static analyzer false positive
  Same tests, reorganized for slightly better coverage
  Where did these spaces come from?
  Test -bind: stopping more thoroughly
  Dispose of source signal when -bind: is stopped
  Remove original coarser demonstration test
  Test that stopping -bind: disposes source signal
  Add test showing case where -bind: doesn't stop
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Lawrence Lomax (20) and others
# Via Justin Spahr-Summers (4) and others
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa: (55 commits)
  Use tabs not spaces
  More efficient implementation of objectPassingTest and any on RACSequence.
  Simplify signal composition for refreshing
  Verify -endRefreshing is called on error
  Whoops, release the _existing_ disposable on return
  Use the same condition for retain _and_ release
  Refactor ternaries in -swapInDisposable:
  Remove nil checks before invoking -addDisposable:
  Allow nil for -addDisposable:
  Revert "Break retain cycle"
  Break retain cycle
  Verify -endRefreshing is called
  Eliminate nested subscription
  Publicize UIRefreshControl+RACCommandSupport.h
  Add UIKit tests for UIRefreshControl
  Add RACControlCommandExamples to UIKit tests
  Add command support for UIRefreshControl
  Fix Cocoa naming convention in example
  Spaces only in comments
  Error is initialised to no
  ...
Merge branch 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa

# By Dave Lee (13) and Uri Baghin (5)
# Via Justin Spahr-Summers (2) and Dave Lee (1)
* 'master' of https://github.com/ReactiveCocoa/ReactiveCocoa:
  More detail in -respondsToSelector: comment
  Make use of rac_getImmediateInstanceMethod
  Merge in ext_getImmediateInstanceMethod
  Added test for NSController support.
  Describe setup of KVO -respondsToSelector: test
  Use -publish/-connect to cause subscription side-effects
  s/is/may be
  Fix misplaced tab
  Letters, how do they work?
  u before a, except after c
  Revert "Add failing test for broken KVO implementations."
  Simplify the feedback ignoring logic.
  Remove stack depth counter.
  Comment on the need to implement -respondsToSelector:
  Make subscription side effects explicit
  Redefine -respondsTo… for -rac_signalFor… on KVO'd target
  Test -rac_signalForSelector: support for -respondToSelector:
  Add failing test for broken KVO implementations.
Merge branch 'master' of https://github.com/nunonamorado/ReactiveCocoa