deposit: base version of form.html template

* Creates form_base.html to make possible ovewriting html blocks in
  an overlay.

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>
base: jquery-form loaded via require.js

* Changes the filters on the jquery bundle to be require.js so it can
  properly load library such as jquery-form.

* Renames legacy.js to init.js to match the naming choosen for search
  and deposit scripts.

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
installation: Flask-Admin>1.0.8,<1.1

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
template: @template_args decorator addition

* Adds new decorator to allow overwritting template context functions by
  endpoint.  (closes #2009)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
general: defaultdict fix

* Replaces defaultdict with collections.defaultdict.  (addresses #2030)

Signed-off-by: Eirini Psallida <eirini.psallida@cern.ch>
Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
messages: require.js messages

* Refactors the messages/add template to use require.js.

* Loads jQuery UI modules individually.

* Fixes the jquery timepicker add-on shim.

* Moves bootstrap.js back into jquery bundle.

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
base: bundles documentation

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
deposit: removal of alert attribute

* Removes useless alert attribute
  appended to the class.

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>
utils: addition of DOI json data fetch

* Adds JSON data response for a given DOI.

* Adds etree to dictionary translation on
  processor utils.

* Corrects get_marcxml_for_doi() misuse of
  plain text params in the url.

* Needs the user's email as a configuration
  variable.

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>
deposit: API for Crossref DOI fetch

* Searches the DOI on crossref and returns the result as JSON format,
  also handles if the DOI isn't found or it's malformed.

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>
deposit: PEP8 fixes

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>
records: API for database querying with DOI

* Adds API to query the database with a DOI.

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>
utils: minimize crossref code

* Squashes common code in get_crossref_content()
  function to minimize repetitions.

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>
base: removal of demosite-specific stylesheets

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>
previewer/base/assets: rename invenio.css -> base.css

* Renames invenio.css to base.css as base.css is a common base stylesheet.

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>