Merge pull request #2 from nohal/master

Plugin changes
fix object initialisation in constructors
fix object initialisation in constructors
fix object initialisation in constructors
added version to caption
added version to caption
fix object initialisation in constructors
upgraded to plugin interface 1.9
Adapt makefile and import to suit new opencpn plugin system
Merge pull request #4 from AlexandreRio/master

Allows to build plugin as independent package
made include path relative again
Changed images to reflect the ones in the main program