allow null mask values
add TileSpec mutator methods
add skipInterpolation option
fix skipInterpolation option
add getHeight
first cut at using mognodb for tile data; add API support for Khaled's skip interpolation option
comment out dao test until we incorporate embedded mongo solution for testing
replace primitive attributes with objects so that JSON serialization skips undefined attributes
change mipMap to mipmap
first cut at mipmap generator without mask de-duplication feature
add mongodb driver to intellij
only generate mipmap file if it does not already exist
add support for consolidating zipped TrakEM2 mask files
fix usage statement for mipmap generator
check for mask removal because of size mismatch
add tileId, z, and bounding box attributes to tile spec
add toString for logging
update test to check for new tile spec attributes
embed bounding box attributes inside tile spec
update export to handle new tile spec attributes including bounding box (sorry for cluttering with more java than is explicitly needed)