Merge branch 'master' into 'master'

Added MLMMJ installer

I've tryed to implement the installer for mlmmj
This is my first experience on merging with an external project. I hope all my work is correct. 
Anyway, I'm here and responsive to your comments
After that, I'm working, by now on the ML web interface. 
I'll do another merge request when it will be ready.

See merge request !432