Add branch selector dropdown to GeoGig datastore settings page
Stub page for splitting up the config between stores and repositories
Merge branch 'geogig-plugin-ui' into geogig_ui

Conflicts:
	geogig/src/main/resources/GeoServerApplication.properties
	geogig/src/main/resources/applicationContext.xml
comment out component addition that breaks the page
Introduce RepositoryManager and avoid duplicates in repo list
Fix form validation and markup issues identified during testing
Merge branch 'geogig_ui' of github.com:boundlessgeo/geoserver-exts into geogig_ui

Conflicts:
	geogig/src/main/java/org/geogig/geoserver/web/data/store/geogig/GeoGigDataStoreEditPanel.java
Use getModelObject instead of getValue when finding the current
repository setting for the branch picker.
Added confirmation dialog for repository remove
Merge remote-tracking branch 'upstream/geogig_ui' into geogig_ui
Include branches on first pageload if possible
Merge branch 'geogig_ui' of github.com:boundlessgeo/geoserver-exts into geogig_ui
Add automated tests for GeoGig setup page
Adding repository edit page
Merge remote-tracking branch 'upstream/geogig_ui' into geogig_ui
Directory chooser to select a target directory or an existing repository
dispose datastore created to fetch branches
add validation to RepositoryEditPanel
Treat file field as a String so wicket won't throw away the value
Merge branch 'geogig_ui' of github.com:boundlessgeo/geoserver-exts into geogig_ui