Upgrade stable version to 2.0.4
UI/UX: context => vocabulary revamp step 1/3

- rename all instances of '(meta_)context' to 'vocabulary'
- implement new unified design (combines context, vocabulary and abstract)

still missing:
- some counting queries
- optimize/consilidate existing queries
- fix tests
- polish (step 3)
Remove composite_primary_keys gem (prepare for rails 4.1)

and refactor madek so it doesn't need it
Upgrade gems to rails 4.1.1; require ruby 2.1.1
Revert sass gem version (bundler problem)
Rename search to text_search
One more search
Fix person search
Fix ...
...wip...
Fix