Cache result of checking whether axis should be inverted for wms layers. Greatly improves speed of connecting to wms layers when a wms server has many available layers.
Merge pull request #1222 from nyalldawson/wms_layer_speed

Cache result of checking whether axis should be inverted for wms layers
push a message bar informing user of crs applied to newly added layer missing crs
improve the message string and append friendly name (e.g. WGS84)
Merge pull request #1223 from nirvn/messagebar_auto_crs

push a message bar informing user of crs applied to newly added layer missing a crs
small changes in italian translations
Merge pull request #1224 from ghtmtt/master

small changes in italian translations