Use Proj directly for reprojection

[asinghvi17]

R is able to gain Julia equivalent speed by going directly through Proj instead of GDAL

[asinghvi17]

See kadyb/vector-benchmark#12

[rafaqz]

Yeah. It because we already had the dep.

[asinghvi17]

by the way, I just tested proj_trans_generic on an array (since I've been doing a bunch of reinterpret stuff :D) and it turns out, it is almost exactly the same timing as using GO.reproject! So you probably don't need to make it too fancy unless you have a huge vector that you want to transform in place, in which case proj_trans_generic might be a bit faster.

[rafaqz]

Yeah tried that too in the past. Julias C calls are so fast it makes no difference