Fixing style editor alert issues.

- Re-enabling validation markers
- Passing alerts to rootScope
fixing new map workflow and adding delete map to map settings
fixing map delete and map add thumbnails
MapController layer representation of title, description, type, kind
Double check kind and type are consistent between Format / Store / Resource / Layer / Map
Added target to .gitignore
Fixing some issues on file import.

- Re-initializing progress/etc... when second file chosen
- Removing spinning indicator when upload complete
mock wms and raster data
Updated geoserver-exts submodule to bring in lazy parsing fix
Updated raster symbolizer page, with examples
Section about wrapping lines in YSLD
Use ResponseUtils to fix URLs
Updated GS-Exts with YSLD improvements.
Adding layers tab
Adding format modal to layers details
small style changes
adding map options after import
Updated geoserver-exts, bringing in default constructor change
Updating geoserver-exts submodule to bring in Expression.NIL fix
fixing backend duplicate request