Merge pull request #76 from Ptizef/master

Improve Air Temperature rendering
Improve route leg popup info window dynamics under Windows with auto-follow enabled. (FS#1054)
Improve RoutePoint list management performance
Activate AnchorWatch alarm on loss of GPS signal  (FS#1106)
Correct AIS AtoN name rendering with Extended Shipname fields set. (FS#1115)
Correct behavior when receiving AIS alert while iconized (FS#968 Redux)
Correct for armhf double alignment requirement,
3.3.1003
Correct for armhf platform double alignment requirement on S57 SENC read.
Correct Typo in previous commit.
Correct loss of AIS target selectability on receipt of unprocessed AIS message type. (FS#963)
Add Options->Connections checkbox for Magnetic bearings on ECAPB output sentence (FS#1151)
Add Options->Connections checkbox for Magnetic bearings on ECAPB output sentence (FS#1151)
Refine Options text for CPA/TCPA and DSC/SART sound alerts.  (FS#1165)
Add shortcut key Ctrl-O to drop mark at ownship, remove "Space" and "Enter" shortcuts. (FS#1136)
Add OpenGL Windows minimal test application (ocpn_gltest1.exe)
Improve CrashReport contents.
Remove CrashRpt test key.
Correct crash on deletion of Routepoint and associated Route with RMD open.
Improve Mac window management on activation and minimization.