Merge pull request #75 from Ptizef/master

Stop sending emails to Zygrib when Login and/or Code not entered
Improve depth indicator symbology and rendering for increased contrast.
Correct Symbolized boundary icon orientation.
Correct symbology for area OBSTRN embedded in otherwise safe water area.
Correct for wxWidgets 2.9 compile error.
Implement private OCPNRegion support
Correct various compile warnings.
3.3.705
Correct memory leaks in OCPNRegion for linux/Windows builds
Avoid hang on Mac with Great Circle route dialog.
Correct loss of focus on Ctrl-I (FS#1001)
Correct for incorrect action on repeated access to Help dialog tab. (FS#1038)
Correct Extended light sector display for "obscured" sectors (FS#1039)
Correct namespace collisions on __WXGTK__ build
Merge branch 'region'
Correct Route/Waypoint dialog modality when called from RouteManagerDialog
Correct TopMar lookup and display on cm93/ENC for MAC
3.3.711
Merge branch 'master' of github.com:OpenCPN/OpenCPN
Correct GPX waypoint http link description field decoding.