Merge pull request #48 from overra/master

Check if target user exists, in oper command
Minor formatting change, added overra to contributor list
Fixes #49: Send message with :
Updates package.json, history
Added support for Half-Ops
Merge pull request #51 from coolstar/master

Added support for Halfops
bump version/release date
Merge pull request #55 from neiltron/master

Bump version/release date
Fix error issue: https://github.com/alexyoung/ircd.js/issues/58
Merge pull request #59 from ping86/master

Fix error issue 58
Fixes the formatting of the last contribution
Renamed Server.prototype.isPositiveInteger to isValidPositiveInteger to be more accurate, added unit test for it
Tested behavour of pipes in nicks to check issue #27