Revert "Merge pull request #104 from testdouble/grunt-contrib-copy"

This reverts commit f98f866526c69bb02a77160c7f1626d7b31a37e2, reversing
changes made to 87e8a2cbbbfe25f1f0893a54cf651d4294a11fe6.

Conflicts:
	tasks/load-stuff.coffee
Detect grunt-contrib-copy configuration and display warning
Merge pull request #156 from testdouble/revert-gcc

Reverts the grunt-contrib-copy implementation of the images and webfonts tasks