add WorksheetPlugin
Merge pull request #728 from ChaoPang/master

fixed the bug where the controller did not extend from MolgenisPluginController
rename/move MolgenisPluginController from core-ui to core
rename MolgenisPluginController to MolgenisPlugin, add all plugins to a registry
set permissions through permission service, use service in db populator
add controller security
Merge branch 'master' of https://github.com/molgenis/molgenis
rename MolgenisPluginController to MolgenisPlugin
Merge pull request #729 from RoanKanninga/master

add WorksheetPlugin
Merge pull request #730 from dennishendriksen/master

Add plugin-level security for spring UI framework
fix plugin id
determine context url
add context url attribute
determine context url
renamed MolgenisHeaderAttributes
rename view
rename view
rename view, use context_url
use context url
use context url