Added branch alias.
Merge pull request #43 from jmalloc/feature/branch-alias

Added branch alias.
Profiling setup for mocking Isolator.
Profiling setup for mocking Isolator.
Implemented mock definition.
Refactored mock builder into definition and builder.
Refactored class name generation.
Implemented hash generator.
Performance improvements, but broken in HHVM for now.
Mocking performance improvements working under HHVM.
Added a property to keep track of mock fullness.
Mock refactor, functional tests only working.
Tests running, coverage still lacking.
Test coverage improvements.
Coverage improvements.
Test coverage restored.
Updated changelog and readme.
Merge branch 'release/0.1.1' into develop
Improved test fixtures for feature detection.
Test fixture order.