Improve inSensorShadow

Use point in world coordinates as arguement in order to avoid unnecessary
transformation.
Trying out travis-ci
Trying to get it working
Wrong node path
Fixed tests on Mac
Removed @private enum doc
Convert the single-tile Earth image into tiled imagery.
Update CHANGES.md.
Trying script instead of install
Tweak CHANGES.md.
Replace remaining usages of old single-tile image.
Remove unused parameters from getIntersectionColor.:
GeoJSON support for EPSG CRS type.

Earlier draft versions of GeoJSON have an EPSG CRS type.
While the 1.0 specification has no such type, many applications still generate GeoJSON in this format.
Changes after review.
Fix typo.
Cleanup CHANGES before releasing b18.
Clean up descriptions on build targets.
Updated to node 0.10 and added jsHint
Fixed typo
Merged jsHint and release into one command