Add -[RACSignal initially:]
Merge branch '2.0-development' into racsignal-initially
Add -intially: to the CHANGELOG
Remove +switch:cases:, change missing default behavior

A missing default now sends an error instead of throwing an assertion
failure.
Inline RACSwitchSignalExamples back into RACSignalSpec
Test that a missing case and default causes a signal error
Match nil values as RACTupleNil
Fix duplicate subscriptions in tests
Update README for 2.0 deprecations
Update MemoryManagement.md
Update BasicOperators.md
Update DesignGuidelines.md
Shout out to RACBacktrace in the Framework Overview
Refactor -initially: to use +defer: internally
Fix broken RACBacktrace link in Framework Overview
Merge pull request #690 from ReactiveCocoa/update-documentation

Update documentation for 2.0 deprecations
Merge pull request #685 from ReactiveCocoa/racsignal-initially

Add -[RACSignal initially:]
Merge branch '2.0-development' into remove-switch-without-default
@joshaber can't handle the power of

THE OTHERWISE OPERATOR
Merge pull request #689 from ReactiveCocoa/remove-switch-without-default

Remove +switch:cases:, tweak +switch:cases:default: behavior