Fix compiling error with some compilers on Mac
[FEATURE]: Add legend url to wms capabilities. Patch from mlechner
Merge branch 'server_legend_url'
Add Marco Lechner to CONTRIBUTORS
cleanup: replace boolean comparison (x==true => x / x==false => x) (followup b40868c8)
identify: clear rubberband after deleting the items
[TRANSUP] es by carlos

Signed-off-by: Werner Macho <werner.macho@gmail.com>
[TRANSUP] gl by Xan

Signed-off-by: Werner Macho <werner.macho@gmail.com>
[composer] Cache features for attribute table, to reduce excessive cpu use and multiple queries to layer provider
[composer] Add a manual 'refresh' button to attribute tables, to refresh table if data has changed outside of QGIS