Issue #2666062: Javascript error [cannot call methods on isotope prior to initialization; attempted to call 'stamp']

Moved data processing from grid and block template files to the relevant preprocess functions in theme.inc.

Merged in new features: sorting and support for multiple filter sets. Updated example feature to include Isotope sort options in a views block.

Fix for #1549726.  Cleaned up sting replacements in both grid and block tpls.  Added some css for the example to format the filter block items horizontally

added Isotope Filter View style to make it easier to create a block of tags and removed unused functions like skin