node v0.10.x support
merge with master
read from file into imagemagick - refs same problem as mapbox/tilelive-vector#3
Merge branch 'master' of github.com:developmentseed/node-blend into node-v0.10.x
remove waf reference
fix tests by avoiding write to stdin
use even faster fmod alternative (ported back from mapnik after testing there)
allow one int of difference between js and c++ rgb comparision - fixes a few tests after 830e99afdce7485f8a3aee1ed1a145220109faaa
fix cast from double to unsigned to round predictably
Revert "fix cast from double to unsigned to round predictably"

This reverts commit 07bc0c865e1d60eed74825deff035fef2ade15da.
second try (this one without accidentally deleting test images):fix cast from double to unsigned to round predictably
fix unsigned/signed comparison warning
add instructions for new way to configure again custom jpeg/png locations
Merge branch 'master' of github.com:developmentseed/node-blend into node-v0.10.x

Conflicts:
	wscript
skip webp tests for now since imagemagick is not likely going to have webp support
tests: ensure file is written before spawn
travis: also test v0.10.x and explicitly install libpng
Merge branch 'master' of github.com:developmentseed/node-blend into node-v0.10.x

Conflicts:
	package.json
Merge pull request #34 from mapbox/node-v0.10.x

node v0.10.x support