introduce internal geoserver URL, refs#579
Merge branch 'iss-579'
uploader - alert user about long filename

refs #741
resolve page context settings once

also add some new flags to toggle features
toggle sharethis and uservoice in template
upload - client zip file handling, some other cleanup
zip sniffing: adjust msgs, add listing

refs #700
Merge branch 'master' into integration

Conflicts:
	media/script/layer_upload.js
Merge branch 'iss-700-client-side-zip' into integration

Conflicts:
	media/script/layer_upload.js