Filled out the elevation support a bit.  Added two new utilities for constructing elevation databases.
Can now output elevation pyramid directly from elevation_tile_pyramid.
Got rid of separate assemble pyramid program
Progress reporting working now.
Exposed elev attribution for shader.
Tweaked ImageChopper usage.
Updates to the elevation pyramid now working.  Now reading shapefiles to create sparse data sets.
Now checking if we have an elevation source in the image layer.  If we do then we give the tiles some height so they show up (more or less) correctly in the display.
Turned down the max number of tiles (for 3D mode).
Removed options that don't work in 3D terrain mode.
Allowing sparse elevation sets to dictate what gets loaded.
Cleaned up code a bit
Exposed image layer refresh in Component.
Added support for image types in Component and texture atlas size control.  Fixed a compile error in Xcode5.
Got rid of -all_load and replaced with -ObjC
Added triggers to pull in the categories.  Can now do away with -ObjC flag.
Release mode optimization was nuking my category fix.
Added more support for byte images.  Doesn't quite work, may need to use an extension to get it going.
Turned off debugging thing.
Fixed a problem with the weather shader and the single byte textures.