[MetaCRS] Motion: Release proj 4.9.1

[Howard Butler]

All,

After 5 release candidates, I would like to motion to promote proj 4.9.1 RC5 to final release. This release supersedes efforts to release 4.9.0, which was abandoned due to not being fully promoted to a final release.

I'll start with +1.

See below for release notes.

Howard

>  o 4.9.0RC2 release was abandoned because it was not promoted in a 
>    timely fashion. Subsequent maintenance of tickets has continued, 
>    and a new 4.9.1 release was issued in its place.
> 
>  o Implement inverse solution for Winkel Tripel from Drazan Tutic #250
> 
>  o More CMake configuration tweaks. The CMake configuration is probably 
>    not at feature parity with the autotools builds at this point but it 
>    is converging #256
>  
>  o Tweak initialization ordering around setlocal which may have caused
>    issues #237
> 
>  o Support out-of-tree autoconf builds more completely #247
> 
>  o Fix NaN handling by geod_inverse and geod_polygon_addedge #251 & #253
> 
>  o Update config.sub and config.guess #257
>  
>  o Adapt Charles Karney's CMake patches for smoother build #258
> 
>  o Define default PROJ_LIB location for CMake compilation #261
> 
>  o Fix Windows compilation on PJ_aitoff.c
> 
>  o Align CMake SOVERSION with autotools #263
> 
>  o Regenerate nad/epsg with GDAL r28536 to avoid precision loss in TOWGS84
>    parameters, e.g. on Amersfoort / RD EPSG:4289 (#260)
> 
>  o Add CMake project-config.cmake scripts (#264 from Charles Karney)
> 
>  o Dial back test sensitivity #255