rework concept checking to be more in line with Concepts Lite, fixes #63
attempt to fix travis build failure
erase_if and tests, protect against accidental nested binds, try to fix travis-ci, fixes #62
misc clean-up, add yield_from for simpler range comprehensions
works with libc++
tests passing with gcc-4.9.1+
cont::stable_sort
cont::take and cont::drop and tests
cont::drop_while and cont::take_while and tests
Do you want a README that's *useful*? Picky, picky.
Fix logic error in logical_or. (See what I did there?)
Merge pull request #64 from cartec/Casey

Fix logic error in logical_or. (See what I did there?)
metafunction clean-up
more metafunction interface tweaks
Update .travis.yml
Use the build matrix instead of manual abort

 - To avoid GCC + satinizers build, use the build matrix instead of a manual abort.
 - The abort on using libbc++ with GCC is not needed, since libc++ is enabled with clang only.
I'm not very good at YAML, sorry
switch to metafunction class, keep on a branch until clang bug is worked around
Merge pull request #66 from Manu343726/patch-1

Enable GCC 4.9 travis build
need meta_quote_alias to turn template aliases into metafunction classes