SDK from 10.10
Recreate Xcode project
Convert OCUnit spec to XCTest
Remove old code, add new
Sequential and parallel composite operations are almost done (also the first test is written)
Initial test for parallel composite operation
First working test for parallel operations, also abstract test operations to a separate class
Introduce <COOperation> protocol to emphasize specifics of COOperation compared to NSOperation
Raise exception on incompatible state changes
Move old tests away
Use @synchronized for COOperation@state for now
Markup for COOperation
Cut off Xcode-generated tests
-reject cancells stuff
2 tests for parallel composite operation
Do not cancel p.c.o. immediatedly
Use @finishedOperations count to simplify final flow of p.c.o.
Basic cancellation semantics for s.c.o.
Cut off COOperation@cancelled leaving it to NSOperation
...