Bigendian Fixes

[wiredfool]

Fixes for images on bigendian machines. Fixes #385

• Image formats were incorrect for I;16 for converting to numpy.
• That exposed issues where tiffs from libtiff were put in native byte order, and native tiffs were in image byte order.
• Save tests were failing due to metadata issues, which are also fixed. Probably fixes Save RGB Tiff using LibTiff raises exception #387, needs tests for that.

Undone, and worth checking out in the future: I;32 and F;16/32 formats, as well as I;16S.

[manisandro]

Thanks a lot for looking at this! Could you also add the new test images?

• Tests/images/12bit.deflate.tif
• Tests/images/12bit.MM.deflate.tif
• Tests/images/12bit.MM.cropped.tif

Also, I get before the test summary:

=== remaining temporary files
/tmp/pillow-tests/temp_file_libtiff_0.png
/tmp/pillow-tests/temp_file_libtiff_4.tif
/tmp/pillow-tests/temp_file_libtiff_2.png
/tmp/pillow-tests/temp_file_libtiff_6.tif
/tmp/pillow-tests/temp_file_libtiff_3.png
/tmp/pillow-tests/temp_file_tiff_0.tif
/tmp/pillow-tests/temp_file_libtiff_5.png
/tmp/pillow-tests/temp_file_libtiff_1.png

[wiredfool]

The images should have been added in 1945fec. I'm guessing that the remaining temp files might be from missing that.

[manisandro]

Hmpf sorry, somehow missed that.

[manisandro]

Hurray, builds successful on all Fedora arches. Thanks again!

[wiredfool]

Yay! Thanks for the acct on the ppc machine.