Add ^ in modulizr regex to filter test names
Add ^ in modulizr regex to filter test names

It is necessary to check if the keyword `tests` starts in a separate
line in order to achive the correct mapping of test names and code.

This commit closes #34.

dailymotion/grunt-modernizr,tobania/grunt-modernizr,shadowmint/grunt-modernizr,niksy/grunt-modernizr,bdaenen/grunt-modernizr,CastroIgnacio/grunt-modernizr,Irmiz/grunt-modernizr,Modernizr/grunt-modernizr,GrimaceOfDespair/grunt-modernizr,mrawdon/grunt-modernizr,optimizely/grunt-modernizr,virtualidentityag/grunt-modernizr,grumpydev22/grunt-modernizr,metaloha/grunt-modernizr