fix minor typo in thunder-ec2 script
PEP8 formatting in ec2.py
PEP8 formatting in ec2.py, typo in thunder-ec2
add aws credentials in .boto file during ec2 setup
use default boto behavior to look up aws credentials instead of requiring env var
convert multilayer tif test data to luminance-only from RGBA
use internal pil_to_array rather than matplotlibs to avoid version dependency