Fixed so that offscreen frame is never visible (true offscreen rendering) (EPD-76)
WMSLayer now follows Observer-pattern (EPD-77)
fix to reflect refactored DragMapRenderer functionality (EPD-76)
fix for epd-shore ais targets not shown (EPD-99)
Fix for tab-indent (checkstyle)
Merge branch 'master' of github.com:dma-enav/EPD