First step to save parameter from forms to mapObj
Fix (hackish) for issue #13

When the map is drawn, mapserver internally adjusts the map extent.
Since we do not want to alter the data provided by the mapfile, we
temporarily save the extent, then restore the original values.
Fixing setMapName()
calls Accept() on parent object after custom behaviour
Merge pull request #14 from yjacolin/saveSettings

Save settings
Merge remote-tracking branch 'upstream/master'