Add proj.4 support to Go

[owsi]

No description provided.

[owcm]

Using https://github.com/pebbe/go-proj-4 project for go wrapper

[owcm]

Update, moved to using https://github.com/xeonx/proj4 project. Everything compiles and the tests runs.
Proj4 of course has to be deployed.
environment variable export PROJ_LIB needs to be set: example export PROJ_LIB=/usr/local/Cellar/proj/4.9.3/share/proj

[owcm]

Moved to using github.com/ctessum/geom project. Pure proj4 Go implementation.
Added unit tests.
No longer a need for PROJ_LIB environment variable to be set.

To project a bounds or list of 1 or more points call the lambdas/proj4support/boundsToWgs84 method

ConvertPoints( epsg string , points []geom.Point ) (outpoints []geom.Point)

Example:

var testPoints []geom.Point

testPoints = append(testPoints, geom.Point{X: 408956.500000, Y:4088009.500000 })
testPoints = append(testPoints, geom.Point{X: 408956.500000, Y:4081996.500000 })
testPoints = append(testPoints, geom.Point{X: 415450.500000, Y:4088009.500000 })
testPoints = append(testPoints, geom.Point{X: 415450.500000, Y:4081996.500000 })

    epsgCode = "32618"      

outpoints := ConvertPoints( epsgCode, testPoints)