Quoted $php variable
Merge pull request #1021 from dmitrybezer/master

Quoted $php variable
Allow source/destination config in migrate-manifest.
Renamed file so it gets picked up.
Add basic tests.
Updated the group so it gets picked up by the test runner.
Removed shorthand array syntax for PHP 5.3
Refactor into a class structure.
Pass the manifest file in.
Removed unused use statements.
BC layer for the module_installer
Refactored to use a test class and fleshed out coverage.