add vips_Flatten() note
README updates
update README
updates to please travis
Regenerate gemspec for version 0.3.7
add vips_thread_shutdown()

vips has some thread-private state and this needs to be cleaned up on
thread exit. Unfortunately it's not possible to do this automatically on
threads which vips didn't create, so for "foreign" threads, you need to
arrange to call vips_thread_shutdown() on thread termination.

this patch bumps the version number and adds VIPS::thread_shutdown

see

https://github.com/jcupitt/ruby-vips/issues/55
Regenerate gemspec for version 0.3.8
update bundle

to help travis
Remove ext/tags from gemspec files

Removed to fix issue https://github.com/jcupitt/ruby-vips/issues/56
Merge pull request #57 from alex88/patch-1

Remove ext/tags from gemspec files

Ooops, don't know how that got in there.
fix up some specs

and update the bundle
update TODO note
fix a segv in label_regions

missing an int->obj cast
add a Valgrind supp file

for ubuntu 14.04, but might be useful elsewhere

see also https://github.com/jcupitt/libvips/blob/master/libvips.supp
small spec fixes
fix up more spec tests
fix monotonic?

the sense had been swapped for some reason
fix more spec tests
allow .data on coded images

helps some rspecs
fix more spec tests

now all pass, except one which needs a vips fix