Allow Images in Docs to render inline [1/1]

This small change allows documentation writers to include images
in their doc pages simply by using the ![title](file.png) syntax.

This doc practice is documented in the formatting.md page that is
already committed.

I also moved the docs to be a child of the devguide rather than UI
information.


 .../app/controllers/docs_controller.rb             |   22 ++++-
 crowbar_framework/app/models/barclamp.rb           |   49 +++++-----
 crowbar_framework/app/models/barclamp_attrib.rb    |    2 +
 .../app/models/crowbar/barclamp_crowbar.rb         |   27 ++++++
 crowbar_framework/app/models/doc.rb                |    4 +-
 crowbar_framework/app/models/jig.rb                |   45 ++++++++-
 crowbar_framework/app/models/jig_event.rb          |   42 +-------
 crowbar_framework/app/models/jig_run.rb            |   57 ++---------
 crowbar_framework/app/models/jig_test.rb           |   30 ------
 crowbar_framework/app/models/node.rb               |   60 ++++--------
 crowbar_framework/app/models/node_attrib.rb        |    8 +-
 crowbar_framework/config/locales/crowbar/en.yml    |    2 +
 .../test/data/barclamp_node_data_test.json         |   12 ++-
 .../test/unit/barclamp_attrib_model_test.rb        |   11 +++
 .../test/unit/barclamp_node_data_test.rb           |   40 ++++++--
 .../test/unit/jig_event_model_test.rb              |   31 ------
 crowbar_framework/test/unit/jig_model_test.rb      |   12 +++
 crowbar_framework/test/unit/jig_run_model_test.rb  |   36 -------
 doc/devguide/documentation.md                      |  101 ++++++++++++++++++++
 doc/devguide/documentation/formatting.md           |   48 ++++++++++
 doc/devguide/model/crowbar_model.md                |    4 +-
 doc/devguide/ui/documentation.md                   |  101 --------------------
 doc/devguide/ui/documentation/formatting.md        |   40 --------
 23 files changed, 372 insertions(+), 412 deletions(-)

Crowbar-Pull-ID: 165114ea2d9e0d0f2a1139cccaaf248572f4518f

Crowbar-Release: development