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 ...
dashboard entrusted resources [#84761392]
add HAML-Lint (gem, config file, cider spec)

also

- cider conf: whitespace
- cider conf: add styleguide-conformity_defaults
rubocop: set RunRailsCops in project-, not CI-config
83
add comment to filter_set.rb due to existing bug in AR
Migrate MetaDatum types and check consistency with meta_keys

Squashed commit of the following:

commit bfc6300a73288e147958cd834eb63e01b451a15a
Author: Thomas Schank <DrTom@schank.ch>
Date:   Fri Dec 19 13:55:05 2014 +0100

    modified:   doc/database_and_entities/Schema_vision.graffle
    modified:   doc/database_and_entities/Schema_vision.svg

commit b3617c23ee6db4bc003f05acc28067ab15812395
Author: Thomas Schank <DrTom@schank.ch>
Date:   Fri Dec 19 13:51:43 2014 +0100

    testing other too

commit 7fc574437c6b1a4f323fececdb5277c88f6a540e
Author: Thomas Schank <DrTom@schank.ch>
Date:   Fri Dec 19 13:39:44 2014 +0100

    ...

commit 0c2a9c7977df2a686e577e6e0ae693f77a4285c2
Author: Thomas Schank <DrTom@schank.ch>
Date:   Fri Dec 19 13:34:58 2014 +0100

    modified:   cider-ci/tasks/rspec-plain.yml

commit f4a79f81fe3bb98e75f654bcaa8a30712aaf9e01
Author: Thomas Schank <DrTom@schank.ch>
Date:   Fri Dec 19 13:33:54 2014 +0100

    rubocop

commit d7000df410e3694c82929d4037c67691f5cf8d88
Author: Thomas Schank <DrTom@schank.ch>
Date:   Fri Dec 19 13:33:16 2014 +0100

    Part one of consistency check

commit b17a3b2b68afb7d65b77edd5998a851270e6a7cf
Author: Thomas Schank <DrTom@schank.ch>
Date:   Fri Dec 19 11:42:31 2014 +0100

    Write check for one direction, second direction and tests pending ...

commit 55128c0233a5d19bf0d4034d397de89c50f99ac7
Author: Thomas Schank <DrTom@schank.ch>
Date:   Fri Dec 19 11:00:03 2014 +0100

    Migrating meta_datum types ...
Add cider-ci coverage spec