Bump up version to v1.2.1 for release,
Add '#' in front of channel if it is not present,
Update screenshots,
Move changelog to `HISTORY.md`,
Merge branch 'master' of github.com:sudar/wp-irc,
Converted readme to markdown format,
Merge branch 'master' of github.com:sudar/wp-irc,
Converted readme to markdown format,
Converted readme to markdown format,
Check if users is an array to prevent PHP warning

git-svn-id: https://plugins.svn.wordpress.org/wp-irc/trunk@851738 b8457f37-d9ea-0310-8a92-e5e31aec5664