bumps to 0.1.1 with changelog
readme edits
More improvements

- SASyncOperation subclasses SAOperation too
- SATransactionalOperation now has sharedData and modifySharedData method
changelog
Fixes tests (since default async queue is concurrent)
OS_OBJECT_USE_OBJC=0 for the whole project
bump to 0.1.2
explicit observers stuff for isFinished
bump to 0.1.3
requirements in readme
Readme cleanup
update installation instructions
0.1.4: compatibility aliases for transactional and cascade operations classes
minor changes
Numerous improvements of composite operations code.

- No more unit operations - composite operations run just SAOperations
- Axes obsolete methods in both cascade and transactional operations
- Use observers instead of context callbacks
- Don't use ivars
- More privacy
Cosmetics on top of previous commit

- Finalizes privacy + "no ivars" changes.
- Axes sync composite operations
refactor SASyncOperation
edit readme
Full NSOperation/NSOperationQueue compatibility

- also cancellation semantics
Refactorings of operations code

- More on cancellation semantics