Added support for 3D texture coordinates to the MeshConsolidator to support texture arrays in the ExtrudeGeometryFilter.

This fixes the issues described at
http://forum.osgearth.org/picking-buildings-osgEarth-city-demo-td7584476.html#a7584480
about feature indexing not working in the osgearth_city demo.
Units: fixed the temporal conversion factors
Defaulting TFS format to JSON
Merge branch 'master' of https://github.com/gwaldron/osgearth
Add gamma parameter to AggLite driver
Remove the .gitignore file added by error
Merge pull request #466 from aurelien35/Dev

Add gamma parameter to AggLite driver
Cube: add comments
ImageUtils: add support for r dimension
Merge branch 'topic-fallback' of github.com:gwaldron/osgearth into topic-fallback
Merge branch 'master' into topic-fallback
Sky: ambient, date; docs update
Merge branch 'master' of github.com:gwaldron/osgearth
Merge branch 'master' into topic-fallback
Fix bad pointer access in Skins
add key-hashing to cachebins and set to true for WFS caching; fixes a legal-file-name bug; also removed annoying cache bin not found message
Add source_tile_size and cache_create_time properties to cache bin metadata.