Merge pull request #405 from tomkralidis/dev

add travis-ci configuration
Update README
Update README
add email notification to geonode-dev
Layer detail button groups (dropdowns) for download and edit
initial wiring for map WMC implementation
Add layer detail metadata dropdown
Add 'remove' to layer edit actions, update remove template
Add branch whitelist to .travis.yml
edited account bar
added Lato font
deleted unused file
replaced word help with icon
edited icon style
added notification, messages and upload icons
Update geonode/locale/zh/LC_MESSAGES/django.po
fix grammar
Update geonode/locale/zh/LC_MESSAGES/django.po
Merge branch 'dev' of https://github.com/Nathan-Wang/geonode into dev

Conflicts:
	geonode/locale/zh/LC_MESSAGES/django.po
Merge branch 'dev' of github.com:GeoNode/geonode into dev