Remove global prefix from common helper functions
Remove global prefix from common helper functions

These globals are whitelisted as read-only available global variables
in "tests/unit/.jshintrc".
As they are read-only, "// jshint ignore:line" is used for these unique
definitions.

craftyjs/Crafty,craftyjs/Crafty,mucaho/Crafty,mucaho/Crafty,mucaho/Crafty,craftyjs/Crafty