Updated Icon path to work with changes from ST3 build 3014

ST3 build 3014 had some changes to how gutter icons worked which in turn breaks Modific's gutter icons from being shown properly. I've updated the path to the icons to make Modific work with build 3014.

for more info on this build see http://www.sublimetext.com/forum/viewtopic.php?f=2&t=11352