introduce an internal URL for geoserver

refs opengeo/mapstory#579
latest gxp to get correct precision on time slider in interval mode
make use of subdomains and set tilesPerFrame to 24 as recommended by @ahocevar
do the Ext.isString check before we call charAt
collapseMode mini for the timeline panel in the composer
latest gxp: do not throw an error when a raster layer gets added to the composer
add a map copied signal, refs opengeo/mapstory#257
exclude annotation layers from sitemap
uploader - handle geoserver down better

refs mapstory/mapstory#732
do not show a header, see https://github.com/MapStory/mapstory/issues/687
add Timeline button to fullscreen map viewer see https://github.com/MapStory/mapstory/issues/687
latest gxp to get rid of Save and Cancel buttons in playback options panel
Merge branch 'iss-579' into mapstory
more informative error message when connection fails
hide number of zoom levels
collapseMode mini and header false on the other timeline-container as well
change Details button text
change text color to orange on timeline button
Have full screen mode cover orange bar
uploader - remove existing csv transform