Add transformation for Romania

[antoniusz]

https://www.cngcft.ro/index.php/ro/download/download/2-software/9-instalare-ntv2

It was published under GNU/GPL license.

Description translated from romanian with google translate.
"The National Center for Cartography provides users with the procedure to install the NTv2 coordinate transformation, from ETRS89 to Stereographic 1970 projection and vice versa, and the correction grid file for use in ArcGIS Desktop. The procedure is described in a .pdf file, and the patch grid is in binary format, with the extension .gsb, and is located in a directory named "Romania". The archive also contains the correction grid in ASCII format, with the extension .gsa, for possible implementation in another type of software. In the directory titled "CustomTransformations" is the file Stereo70_To_ETRS89_1.gtf resulting from implementing the NTv2 transformation in ArcGIS Desktop."

Instalare_NTv2_v1_1.zip