[Proj] Proj 4.9.1RC3 Released

[Howard Butler]

> On Feb 22, 2015, at 4:55 PM, Howard Butler <howard at hobu.co> wrote:
>> 
>> However this isn't a big deal, and I can back out of this change if you
>> like.
> 
> Yes, the SOVERSION target properties set to match libtool is just fine. It's that there's also a CMake VERSION target property that causes a libproj.4.9.1.so link to be created as well. I assume we don't want that (it's different behavior than the libtool build).

I misspoke. The patch outputs correctly. Sorry for my confusion. 

I'll issue RC4 in tomorrow morning.

Howard