add class for content custom grid thumbs using fontawesome
add default content tab icons
insert tab icon if any
add custom ticker grid thumb
remove color from grid-item
class for content icon placement
remove obsolete comment
render html in ticker tile now
show content type icon on tile
Add ConcertoConfig caching, close #504.
Attempt to avoid some recursion?
Disable ConcertoConfig caching by default so our stack level doesn't get too deep.
fix strong params on import
add image to strong params
fix irrelevant strong checking
fix import test
remove extraneous param
Merge pull request #510 from concerto/template_strongparams

fix strong params on template import
heading tweaks, no hover on p
Removing plugins gemfile from VC per #512