update: Added IRC article and updated irc link

* This commit adds a simple article about our IRC channell and describes
  an easy way of connecting to it.
* The link to the IRC channel at the contact page got changed to a
  kiwiirc.com link

Signed-off-by: mr.Shu <mr@shu.io>
update: Updated new contact email

* Using contact@mail.xlc-team.info where possible.

Signed-off-by: mr.Shu <mr@shu.io>
Merge pull request #13 from xlcteam/mrshu/irc-updates

update: Added IRC article and updated irc link