Merge pull request #3 from martinfelis/master

Added license information, functions and documentation
remove docs html
fixed stray html code in documentation source
ignoring vim's temporary files
Changed host:get_peer() and added more wrappers

host:get_peer(index) now returns the specific peer at a given index and
not the n-th connected peer.

removed functions:
  host:connected_peer_count() (can be done manually)

added functions:
  host:compress_with_range_coder()
  peer:index()
	peer:state()
	peer:connect_id()