Merge pull request #64 from seandepagnier/master

Add plugin georef functionality, and grib plugin formatting
Update PlugIn API 1.10 utility functions
Convert georef,cpp module to thread-safe (no statics) form
Set Minimum Size for AIS Target List (FS#1002)
Add simple sound file support to PlugIn API 1.10
Resolve conflicts with georef API.
need sync sound because sound is stopped in destructor
when leaving scope which occurs before the sound is heard
when playing asyncronously