mapnik/mapnik — pull request #1705 by springmeyer (2013-01-29 08:11:40+00:00)
Title: Lazy proj4 - make projections faster

- Makes PROJ4 able to be turned off as a configure/compile option
- Speeds up transformations for merc/longlat where proj4 is not needed
- Allows for lazy initialization of proj4, when needed or not, to avoid overhead of proj4 mutex locks if possible
- Closes #1703 - see the ticket for more details.