Moved /room kick to /kick
Moved /room ban to /ban
Moved /room subject to /subject
Removed /room info command, covered by /info
Added /affiliation and /role commands
Allow /role list and /affiliation list with no args
Added validation to /role and /affiliation
Updated TODO
Show role/affiliation on room join and on change
Merge branch 'master' into xep-0223