Fixed ls command. command now uses v3 of github api.
wget Mac/Linux bug fix
FVM update for ls and install cmds
Added functionality to use.
Added "ls" command to fvm
fixed wget and egrep/sed lines to work cross-platform;
fvm auto downloads tagged packages from theVolary's feather repo and sets up environment variables so you can easily switch between released(tagged) versions of feather runtimes