Using glyphicons font paths in a similar way to fontawesome paths
updated generators
removed .pngs for glyphicons that are not used anymore
Glyphicons should be imported explicitely

see documentation/generators
Updated generator to correct value of @icon-font-svg-id

Namely glyphicons_halflingsregular
Merge pull request #783 from panmari/glyph-fix

Fixed Glyphicons for bootstrap 3.2