Handle large files better
Use existing ranch send_file with offset, length
Cleanup includes
send_file refactor for efficiency
Merge branch 'send_file' of github.com:masteinhauser/plug_byte_serve into send_file

* 'send_file' of github.com:masteinhauser/plug_byte_serve:
  send_file refactor for efficiency
  Cleanup includes
  Use existing ranch send_file with offset, length

Conflicts:
	lib/plug_byte_serve.ex