Re-installed karma 0.12.9 on a case sensitive file system

karma was not running properly on a case sensitive file system.
This was probably due to an update by @jamesshore on a case insensitive file system, where git just didn't care about the renamed files.
I npm re-installed karma, so that it is now also working on a case sensitive file system.
This commit only contains the relevant changes. I had other changes after re-installing in the karma/node_modules, which I resetted.