Update showbot to use the latest cinch and cinchize + a few other tweaks.

Deleted and re-commited the relevant changes to the master branch of my fork to avoid some messy commits, hopefully this is clean enough to merge without much issue.

I only did some light testing, but everything seems to be in order to close #36.
Cinchize was quite the pain due to my lack of experience, but once i realized what i needed to do, it was rather easy. The code for showbot_irc.rb was put together with some helpful pointers from Netfeed.

Added the needed things for cinch-identify, which closes #34.

Also removed the specific version requirement on ri_cal, since the latest version seems to not have any issues in my testing as well.