[wd] v0.2.2: Added MIT-License
Revert "specify python2 in shebang"

"/usr/bin/python2" does not exist on Mac OSX (see #2382), so fuck people who have
"python" symlinked to "python3"

This reverts commit e5ed07e2b5740346d2a32b3a47204612d8808723
make sure cache dir exists, just like log dir
gem plugin: added _files to install command

is useful if you want to install a local gem from the filesystem
Merge pull request #2922 from ncanceill/easymerge

Easy-to-Merge via @ncanceill... our hero!