Do not synthesize CALayer properties

The CALayer class has automatic properties so we can just use @dynamic instead of @synthesize
See Rob Napier (@cocoaphony) Animating Custom Layer Properties talk at http://cocoaheads.tv/animating-custom-layer-properties-by-rob-napier/
Merge pull request #10 from 0xced/dynamic-properties

Do not synthesize CALayer properties
Minor changes to README & LICENSE; indicate iOS5+ requirement, regarding Issue #9
Add `indeterminate` state (re: Issue #10)
Add example code for `indeterminate` state
indetermine should return an integer

The existing code fails with strict compiler settings. Return 0 if not
indeterminate, 1 if it is.

DACircularProgressView.m:216:12: error: incompatible pointer to integer
conversion returning 'CAAnimation *__strong' from a function with
result type 'NSInteger' (aka 'int');  [-Werror]
return spinAnimation;
Merge pull request #12 from timle8n1/master

With strict compiler settings returning CAAnimation * from indeterminate property fails to compile.
Added support for initWithCoder.
Added sample in sample project.
Updated sample project to use iboutlets.
Merge branch 'feature/init_with_coder_ib_support' into develop
Updated readme to use IB.
Using master branch as a base
Updated sample project to use new CLANG stuff.
Merge branch 'feature/update_to_latest_code_base' into develop
Get rid of unecessary code.
Fetched the podspec from Cocoapods.
Merge pull request #13 from influitive/develop

Added initWithCoder -  updated sample project and read me
Update selectedDebuggerIdentifier
Add Default-568h for example to support iPhone 5
Adjust NIB files for example to support iPhone 5