travis: pip --upgrade removal
JSONAlchemy: allow `extend` on parser extension

* Allow to extend the content of the parser extensions, like for the
  producer rules.

Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@cern.ch>
JSONAlchemy: bug fixes
setup.py: invenio version hotfix

* Removes -dev from version as demosite does not fancy it.

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
base: bindModals() global JS callable function

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
base: disable populate bibupload task

* As it's not needed on labs.

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
comments: notes and PDF preview features

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
Gravatar fix

* Set GRAVATAR_DEFAULT = "https://invenio-demo.cern.ch/img/user-icon-1-20x20.gif"

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
accounts: disable local login

* Set CFG_DISABLE_LOCAL_LOGIN.

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>