unhide filters
showCategories button
marketplace filters
take out unneeded script
misc tweaks
add helpful comments
fix indentation
add styles back in that mysteriously disappeared
hide categories when filtering on popular or az
move filter to marketplace controller
change #ccc and #fff to variables
change categories to match production
Merge pull request #9 from UW-Madison-DoIT/filters

MUMUP-1170/MUMUP-1185/MUMMNG-886: Filters