Show only master branch status in the wercker badge.
Show only master branch status in the wercker badge.

cmars/tools,cmars/tools,tw4452852/the_platinum_searcher,cmars/tools,aeruder/the_platinum_searcher,thomasf/the_platinum_searcher,yuya-takeyama/the_platinum_searcher,syohex/the_platinum_searcher,DaSea/the_platinum_searcher,monochromegane/the_platinum_searcher,cmars/tools