Record screen as the dependency for testing
Replace spaces used for indentation with tabs
Add USE=shell
Add pypy to the list of compatible python implementations
Merge pull request #12 from ZyX-I/powerline-fixes-5

app-misc/powerline: support mksh, dash, and pypy
app-vim/powerline-python: depend on vim 7.2
app-misc/powerline: dash, busybox, mksh USE flags
media-libs/mt32emu-1.4.0: new
media-libs/mt32emu-alsa: new

Also corrected a minor installation issue in "mt32emu" itself.