Revert "fix to use karma-mocha@0.1.1"

This reverts commit f1231aa8a581b65cad6d8caf4eb3f37205b8184f.
Revert "fix to use karma-coffee-preprocessor@0.1.3"

This reverts commit 0336e1b718084a3dc488612e1c6f50b7d0f2d4d1.