Add STProject method with test

[sharkAndshark]

st_project, a geography input/output method added.Call STProject(a,b,c) will take a geometry input and trigger type casting at PostGIS.

PostgreSQL will usually cast geometry/ geography as needed.

Behavior here:

geometry -> geography automatic
geography -> geometry explicit

SELECT ST_AsText(ST_Project('POINT(0 0)', 100000, radians(45.0))); POINT(0.635231029125537 0.639472334729198) SELECT ST_AsText(ST_Project('POINT(0 0)'::geography, 100000, radians(45.0))); POINT(0.635231029125537 0.639472334729198) 

Releated doc here:
npgsql spatial mapping
PostGIS geo data types

[apdevelop]

I've planned to start implementing geography support after completing most current tasks on geometry, XML comments cleanup first of all and releasing it as 0.1 version of Nuget package.

[sharkAndshark]

OK . Hope can help this.