Windows: revert to VS2014CTP4, update to latest mapnik SDK v3.0.0-rc1-242-g2a33ead
Windows: revert to VS2014CTP4, update to latest mapnik SDK v3.0.0-rc1-242-g2a33ead

Uli1/node-mapnik,langateam/node-mapnik,Uli1/node-mapnik,stefanklug/node-mapnik,tomhughes/node-mapnik,tomhughes/node-mapnik,MaxSem/node-mapnik,CartoDB/node-mapnik,Uli1/node-mapnik,stefanklug/node-mapnik,stefanklug/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,tomhughes/node-mapnik,langateam/node-mapnik,MaxSem/node-mapnik,CartoDB/node-mapnik,MaxSem/node-mapnik,langateam/node-mapnik,CartoDB/node-mapnik,Uli1/node-mapnik,tomhughes/node-mapnik,tomhughes/node-mapnik,mapnik/node-mapnik,mapnik/node-mapnik,mapnik/node-mapnik,CartoDB/node-mapnik,mapnik/node-mapnik,langateam/node-mapnik,stefanklug/node-mapnik,CartoDB/node-mapnik,MaxSem/node-mapnik