Merge pull request #110 from bambooforest/master

Clean scripts directory
remove tokenizer
fixed requirements for tests
fixed requirements for tests
Merge pull request #111 from xrotwang/master

Fixed travis config
renaming project-level directory used for some development tests
completed partial test for phylogeny
update test, small bug
added tests
Merge pull request #114 from xrotwang/master

added tests
added test (stubs) for two more modules
Merge pull request #115 from xrotwang/master

added test (stubs) for two more modules
refactored the caching mechanism to use AppDirs.user_cache_dir instead of <cwd>/__lingpy__ as cache dir
small fix in setup py where important files were missing, also added pathlib as requirement for py < 3.4
didn't look at the code, was struck by travis error
trying to fix installation bug on travis
last try to fix bug in install with missing modules
new approach to caching: pickle the whole object and make unpickling explicit.
Merge remote-tracking branch 'upstream/master'
cheap workaround for installation problems