be explicit about png32 to adapt to https://github.com/mapnik/mapnik/issues/2028
deprecate Datasource.features - refs #180
fix version in deprecation message
disable webp buffer length test
test for unexpected coordinate output in JSON serialization. refs #179
test all branches
Merge pull request #182 from rclark/geojson-test

Test for unexpected coordinate output in JSON serialization
travis: start testing both mapnik v2.2.0 and v2.3.x
Merge branch 'master' of github.com:mapnik/node-mapnik
skip broken test on 2.2.0 - refs 179
travis: quiet install
fix #190
update changelog after #190
install the new mapnik-input-plugin packages
unbreak node v0.10.x build on OS X - refs #190
fix #186
fix travis url
fix -Wshadow warnings
avoid pkg-config being executed on windows
support mapnik 2.3.x and SHAPE_MEMORY_MAPPED_FILE usage