Add whitelist security filters
Merge branch 'geogig_ui' of github.com:boundlessgeo/geoserver-exts into geogig_ui
Update for GeoGig API change
Merge remote-tracking branch 'upstream/geogig_ui' into remote_security_log

Conflicts:
	geogig/src/main/java/org/geogig/geoserver/web/RemotesPage.html
	geogig/src/main/java/org/geogig/geoserver/web/RemotesPage.java
apply formatting
Reduce compilation warnings in remotes whitelist code and refactor for higher cohesion/less coupling.