GEOS5510 - added file chooser to ImageMosaic store
added constructor to RawMap taking input stream
Merge pull request #135 from svzdvd/GEOS-5510

GEOS5510 - added file chooser to ImageMosaic store
Code contribution agreement restored to the developers guide

Signed-off-by: Jody Garnett <jody.garnett@gmail.com>
Merge branch 'master' of github.com:geoserver/geoserver into GEOS5620-javadoc_logging
wms-eo: added page to create eo layer group