add failing tests for circular chains involving singletons and not singletons
simplify failing tests
SingletonA not really needed for test to fail
simplify and organize tests
tentative solution to multiple instantiation of singletons
document test
Merge pull request #50 from cesteban/singleton-circular

Singleton circular
Credit contributors.
Add API docs.
Use forwardInvocation instead of resolveInstance method.
Code formatting.
Extract runtime arguments.
Fix tests.
Revert to 5650ec8e30d9c963088f96edc764d7972bb0e9a4
Use forward invocation for block assembly.
make TyphoonPropertyInjectionDelegate methods optional
add AppCode project files
rename misleading constructor suggesting a BOOL param when an enum expected
Fix build.
Change to iOS 7.0