Update database schema/entities diagram, update README point to docs

Squashed commit of the following:

commit 6247fae507b5e455c00e2eb510eb0b9fa1d7d723
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Dec 15 09:22:11 2014 +0100

    ...

commit a116a44265783b83c6e00fed6756c9f1b7ef3fb5
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Dec 15 09:21:10 2014 +0100

    ...

commit 4d544cc4d2a2b6bd0f4f3fb2bdce63c7204ca946
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Dec 15 09:18:26 2014 +0100

    ...

commit bc9c183b5a3d809addb8ae6ea9fda3a9856d99c2
Author: Thomas Schank <DrTom@schank.ch>
Date:   Mon Dec 15 09:06:11 2014 +0100

    Update database schema / entities diagram
Update "Schema_vision" to reflect favorites
Initial description of our submit and review process
Upgrade cider_ci-support
migrate uploader to media_files.uploader_id and media_entries.creator_id
dashboard resources: latest, imports, favorites
add created_at to favorites migration
some enhancements to rubocop linting
restore from v2: app/assets/{fonts,images,stylesheets}/*

from: https://github.com/zhdk/madek/blob/e4be79783e3270b499fb0397eb3f3bd00a0a2a02/app/assets/

This reverts PARTS OF commit "Delete all in app/*, vendor/*, config/initializers/*  we do not need right now" (ca03d906f235fcbb61f8b1290c4e7cca5e6079fc).
restore from v2: vendor/**

from: https://github.com/zhdk/madek/blob/e4be79783e3270b499fb0397eb3f3bd00a0a2a02/vendor/

This reverts PARTS OF commit "Delete all in app/*, vendor/*, config/initializers/* we do not need right now" (ca03d906f235fcbb61f8b1290c4e7cca5e6079fc).
restore from v2: app/helpers/application_helper.rb

from: https://github.com/zhdk/madek/blob/e4be79783e3270b499fb0397eb3f3bd00a0a2a02/app/helpers/application_helper.rb
env: default to 'ugly' HAML output in all environments

- in the browser (inspector) it makes no difference
- due to whitespace handling some thing can appear broken in dev which would be fine in production = debug hell
gemfile: group frontend gems
Gemfile: retire 'haml_coffee_assets'

R.I.P @netzpirat
Gemfile: re-add compass-rails (needed for IXT Sass framework)
add "Living Styleguide"

- convert old static styleguide to HAML
- build fully dynamic, "living" styleguide, make resourcefull-ish
- add basic spec test, trying out screenshots
- doc: add some research links, ideas
- disable some js for merging
- move logo image to proper place
- styleguide: fix images (assets paths) and links (#foo)
- fix spec/spec_helper_feature.rb
- uberadmin: disable animation since sass/compass fails on the import
Add development guides (general and admin)

minor adjustment submit_and_review_process

Squashed commit of the following:

commit 4400f032c236a77132c25d3342c819466d9b187b
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 08:41:54 2014 +0100

    Some refinement

commit 78d4f07af63c9293991f3eeaecee492a3bc75cf8
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 07:36:25 2014 +0100

    Expand dev/madek_guide

commit 8ce2e6223691492261a277d4c3486f4d42f6dc43
Author: Thomas Schank <DrTom@schank.ch>
Date:   Tue Dec 16 13:45:02 2014 +0100

    Add initial development guides
Add MetaDatum::People model, factory and specs

Squashed commit of the following:

commit a4d9005f5b263dd745977a8c852e886dae56f028
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 13:41:13 2014 +0100

    ... do the rubocop thing ...

commit 9c2c06fafe8d4a62c81dbe7ba3cc3cfa410466c2
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 13:33:54 2014 +0100

    ... update cider-ci tasks  ...

commit eaaad9e010c04eabe023ec5027da12577d3732ae
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 13:32:50 2014 +0100

    ... specing out ...

commit cd4bff7de77e5a73181d441c8c2acdb983f178bb
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 12:50:08 2014 +0100

    start ...
Improving MetaDatum::People specs
Add MetaDatum::Users model, factory and specs

Squashed commit of the following:

commit e6c68269a8d7f708e7415862e16d1ff4946b449f
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 15:12:42 2014 +0100

    Minor fixes

commit 7279f91e02cacae941674a91d5066154865b2e00
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 15:05:29 2014 +0100

    spec fix syntax

commit 602f4690f2e39760149a02c7c2612a194b3383ec
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Dec 17 15:03:35 2014 +0100

    introduce meta_datum_users ...