ext: fix language usage
installation: setuptools version

* Add version requirement for setuptools in order to avoid conflicts
  with setuptools-bower
  (https://github.com/lnielsen-cern/setuptools-bower).

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
installation: Bower font-awesome

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
installation: fix for inversed user/database name

* Addresses an issue with inversed user and database name in
  `inveniomanage database init` command.

Signed-off-by: Alessio Deiana <alessio.deiana@cern.ch>
Reviewed-by: Samuele Kaplun <samuele.kaplun@cern.ch>
sqlalchemy: change JSON type to native one.

Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
jsonalchemy: update `parser.py` for pyparsing 2

* Transform hardcoded decorators into extensions inside the parser
  folder. The new decorators are cataloged as `before`, `on` and `after`
  depending on when they should be evaluated.

* All the decorators that before needed always a tuple now works as
  `@decorator(*args)`.

* Remove `@inherit_from` decorator from field definitions as it is
  replaced by `@extend` and `@override`.

* New decorator extension added `@connect(field_name[, function])` to
  link to fields and propagate changes from one to the other and vice
  versa.

* Remove `include` form field definitions as now registries are used.

* Replace `checker` section by `schema` to perform simple validations,
  like type or length. For more complex check use the checker module.

Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
jsonalchemy: add `jsonext` as common namespace

Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
jsonalchemy: update readers and SmartJson

* Update all parsers to work with the new structutre of the field and
  model definitions, meaning using the extensions properly.

* When translating a new blob there is no need any more to go through
  the `readers` registry, instead call `Reader.translate`. See the
  method docs for more info.

* Update SmartJson to work also with new extensions and decorators
  structure.

Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
WIP