added ST_Line_Interpolate_Point function for PostGIS
added ST_Azimuth function
added more AST functions
fix for case-sensitivity bug mentioned in issue  https://github.com/djlambert/doctrine2-spatial/issues/1
added more geometry functions
typos fixed
added ST_MakePoint
added ST_Extent function
cleanup and adding ST_ClosestDistance
more postgres functions added

ST_Boundary
ST_MakeLine
ST_Scale
preparing for pull from parent