dev/reset: make more readable
admin: meta context with meta key definitions section and groups section

Squashed commit of the following:

commit ed25df156659ab8c6aa15851afd01467e9129c58
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Mon May 26 10:09:09 2014 +0200

    meta context with meta key definitions section

commit cb07a0a5573440fdef6d52b348ecb929fd3d9466
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Mon May 26 07:34:42 2014 +0200

    admin meta context groups section
admin: fix person edit.

delivers [#71113516]

Squashed commit of the following:

commit ac6b5d4e47e8b3a8e985afca18c7006438cc6f85
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Sun May 25 09:00:36 2014 +0200

    fix person edit
routes: rename 'media_entries' to 'entries', 'media_sets' to 'sets' and 'media_resources' to 'resources'

also:

- adds redirections for 'legacy' routes
- adds to /doc: a Markdown table of GET routes for viewing on github (plus script to generate it)
prepare routes and tab-navigation
import raw html from styleguide for mockup
more structuring: controller method, partials
more structuring: tab navigation, partials also for media_sets
throw out static mockup, build with haml and data. cleanup unused templates.
#tmp: directly edit style guide. add data-properties for scripting.
js: implement filterbar functionality (in style guide) #tmp
js: implement slider functionality (in style guide) #tmp
slider: grabHandle: use correct typographic entities (thin space, multiplication sign)
start of porting new design to media_sets
more #cleanup
move js from styleguide to templates, fake missing count data with random
tmp: mark where the 'count' would go in the json helper
ui: filterbar: make displaying of resources-type-filter conditional; turn it off in context/entries
prepare more variables
beginn fixing tests