GEOS 3.5 & PROJ Update & PostGIS 2.2

GEOS Framework updated to 3.5. Needed for PostGIS 2.2. PROJ Framework updated to fix linking problem with tools.

This is also the beginning of a system minimum update. GEOS and PostGIS now have a minimum system of Mt Lion (10.8), though Mt Lion appears to be now dead from the absence of a recent security update. I need to support Mt Lion for a short time at least, but I recommend at least Mavericks and in the near future I might shift the minimum to Mavericks.