Move src/env.sh to .local
Add mpv configuration file
Let libdvdcss store cached keys in ~/.cache/dvdcss/
bash/environment.sh: Remove matlab libxcb workaround

I'm no longer using matlab (use octave!), and i'm not even sure this
workaround is still needed. Remove!
bash/environment.sh: Comment out luakit as default browser

luakit has no development for more than one year, have to use chromium
for now.
quvi/zdf: Meta format seems to be not generic, use zdfmeta as func name