Fixed command parser not detecting more star args

Command parser would only pick up on one star arg previously. Fixed that
now, so a table (starArgs) - where the key is what # argument the star
arg is - is now passed on to commands' onRuns instead.

Changed the flag management commands again in accordance with this, so
now you can do stupid shit like /flaggive * * to give every player every
flag.

Also added nut.command.GetBufferFlags, it returns all flags in the
buffer as a string. Useful for getting all existing flags as a joined
string.