-#43 adds command generate-tests for a source directory.
- Scans the source, gets the classes and then calls the existing generate-test.
- Uses composer ClassMapGenerator to find the classes -- new dependency on Symfony/Finder
- passes tests
Merge branch 'dev/43' into stable

* dev/43:
  -#43 adds command generate-tests for a source directory. - Scans the source, gets the classes and then calls the existing generate-test. - Uses composer ClassMapGenerator to find the classes -- new dependency on Symfony/Finder - passes tests