remove PIL, add Pillow in ec2 init script
Merge pull request #52 from industrial-sloth/ec2_pillow

remove PIL, add Pillow in ec2 init script
support plain 'F' and 'I' PIL image modes in pil_to_array
replace pil_to_array with plain array() call
Merge pull request #59 from industrial-sloth/0.4.x_tif_float

0.4.x: fix floating point tif loading
#50 Squeeze out singleton dimension
Better handle invalid options
Merge PR #59 forward from branch '0.4.x'