+ Working on cleaning up volume shader
+ More volume cleanup (much nicer now)
+ Fixed nonessential shader
+ Upgrade to latest GWEN and SFML
+ Update to latest GWEN interface
+ Added camera toggling again.
+ Some library fiddling
+ Updated libraries
+ Starting some overhaul work
+ Renamed SciDataSet to SciDataCollection and cleaned up interface a bit

--HG--
rename : VolumeVisualization/SciDataSet.cpp => VolumeVisualization/SciDataCollection.cpp
rename : VolumeVisualization/SciDataSet.h => VolumeVisualization/SciDataCollection.h
+ Attempt to patch interfaces to new SciData and Collection interfaces
+ Work on fixing DataCollection
+ Fixed data loading!
+ Removed some deprecated code
+ Cleaned up and documented SciDataManager/Collection interfaces
+ More refactoring work
+ Fixed compilation issues
+ Some conversions to work with smart tether data
+ Smart tether parsing!
+ Better smart tether visualizations
+ Connecting lines for glyph view
+ Fix to intermittent crash?
+ Work on fiddling with DataLoadingThread
+ Added .hgignore and some forgotten/missing files
+ More work on fiddling with data loading thread
+ More hgignore