Fix bash completion header/footer

Fix up header/footer to match rest of distribution's bash completion
scripts in /usr/share/bash-completion/completions.

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>
Move bash completion file to new completion dir

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>
Indicate support for Transmission version 2.81
Merge branch 'master' of https://github.com/jmccrohan/transmission-remote-cli