Merge pull request #1 from Orbiter/master

fixed installation details a bit
improved README
Upgrade to Rails 4
Refactoring
WIP
WIP [2]
Use Ruby 2.1
Use MongoDB instead of PostgreSQL
Migrations removed
README fixes
Work in Progress
README
More work
Filebrowser added
Display cache timestamp
Add Apaxy icons
Upgrade to Rails 4.2
SASS updated
Bundle update
Check path