+ add eq/neq operators value_null <--> T
mapnik::value - return 'infinity' if rhs == 0 to avoid division by zero
Merge branch 'master' of github.com:mapnik/mapnik into render-time-variables
do inherit dynamic library path
Merge branch 'master' of github.com:mapnik/mapnik
Merge branch 'master' of github.com:mapnik/mapnik into render-time-variables