DroidPlanner: Auxiliary functions
DroidPlanner: Commenting some of the auxiliary functions
And renaming some private variables
DroidPlanner: Renaming some functions to give a better understanding of the code
DroidPlanner: Finishing the grid generation function. Function to generate waypoints from the hatch lines.
Needs some testing but it seams to work ok.
Added some helper functions to MissionMananger.
DroidPlanner: Cleaning up the U.I. and removing some debug code for the polygon mode.
DroidPlanner: Adding a menu to select options to do the hatch fill on a polygon.
DroidPlanner: Auxiliary function to calculate the area of a polygon
DroidPlanner: Adjusting the Polygon dialog U.I.
Extending the range of the angle dialog.
Initial angle is the 90º off the screen rotation.