fix(karma): rollback grunt-karma to 0.6.2

Was getting a lot of errors when performing
> AngularFun@2.1.5 install /Users/cary/Documents/projects/AngularFun
> grunt bower:install

[4mRunning "bower:install" (bower) task[24m
[32m>> [39mCleaned target dir [90m/Users/cary/Documents/projects/AngularFun/bower_components[39m
[32m>> [39mInstalled bower packages
[32m>> [39mCopied packages to [90m/Users/cary/Documents/projects/AngularFun/bower_components[39m

[32mDone, without errors.[39m

Execution Time (2014-02-04 00:15:35 UTC)
bower:install  4.2s  ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 100%
Total 4.2s
chore(CNAME): remove CNAME