fix #302
Add to changelog
pass variables from js to c++ for vtile.render
make binding.gyp more cross-platform by default
strip newlines in svg test
allow a few windows tests higher tolerance
use new mapnik-sdk
try new win sdk
tweak windows unpacking directories
make sdk build on windows easier to run partially
appveyor: back to requiring tests pass
Only define ASPECT_RESPECT if mapnik supports it
add map.clone()
update changelog
Merge pull request #303 from tomhughes/aspect

Only define ASPECT_RESPECT if mapnik supports it
mark map.clone as experimental
Support for webp is a mapnik 2.3 feature
The native SVG renderer is a mapnik 2.3 feature
Merge pull request #304 from tomhughes/tests

Don't run tests for features that need a newer mapnik
use latest mapnik-vector-tile