Updated changelog for version 2.4b5
For some reasons this file was not merged in PR #1811
Update views.py
Merge pull request #1868 from Geode/making-abstract-optionnal-for-external-catalog

as for wms, adding default value for catalog abstract field when creating catalog remote service (not null by datamodel)
Added the test required by @ingenieroariel in #134
Bumped version dependency for OWSLib
Merge pull request #1872 from gamesbook/ows

Bumped version dependency for OWSLib
Merge pull request #1869 from capooti/issue-134

Added the test required by @ingenieroariel in #134
Minimal modifications to the comm_bylaws file

Modified some capitalizations and added spaces to the file to improve
the reading.
Merge pull request #1874 from al3mon/bylaws_docs_fix

Minimal modifications to the comm_bylaws file
move ng-cloak css out from extra-head, fixes #1871
Merge branch 'master' of https://github.com/GeoNode/geonode