Merge pull request #76 from lovell/master

Add optional optimize_coding param to JPEG output methods to compute optimal Huffman coding tables, defaults to FALSE.
vips_conv() should work
Merge remote-tracking branch 'origin/master'
cosmetic
more cosmetic
im_ismonotonic() becomes a class
deprecate im_tone_map() and im_tone_analyze()

too trivial and specialised to be worth redoing
add --band arg to maplut

you can chose to map just one band of @in through a one-band lut, use
for adjusting L in a LAB image, for example
small oopes
remove some orphaned code
track local mem allocs for debugging
revise TODO
add vips_similarity()

simple wrapper over vips_affine() that lets you give the matrix as scale
+ angle.
version bump ready for 7.36
fix up po/
build fixes for OS X

stupid libjpeg and their stupid bool type argh
typo
catch jpeg startup errors

thanks mvgulik
bool type was wrong

IM expects a uchar, thanks mvgulik
version bump