Initial checkin for assemble tiles files
Optimization: When restoring from a pickle, only set data structures to uninitialized state.  Do not regen automatically.
Removed semi-colons
Added helper functions for finding transform bounds
Added helper functions for finding mosaic bounds
Added function to determine image size using pillow fork of PIL
Added pillow>2.0 to dependencies
Optimization: Do not wrap points in numpy array if they are already a numpy array
Remove unused import
Added parallel assembly of mosaics
fixes for scripts added with install
Return a mask along with the assembled image
Merge branch 'Assemble'
Changed member variable name