Removed guts_font_url()

Function not required. Put plain stylesheet link in script loading function instead.
Corrected syntax error in input button style
Made sure all references are to Guts
Added credit line
making sure my name will not be included in translation file
Improved post navigation function
-removed duplicate function guts_paging_nav() which did the same job as guts_post_nav()
-updated container markup to use Foundation button-group
-added new function to add button classes to next and previous link output using the filters for each function.
Added custom gallery shortcode
- removed default wp gallery shortcode and created new function to customise markup
- altered containing elements and classes to use foundation block-grids and secondary labels