Added akismet for spam checking and removed recaptcha
Removed hacky returning 'spam' from comment class. Check if spam in controller
through getSpam method
Added check for akismet errors before submitting a comment. Throws error if
there are any problems.
Added notification about submission of IP address to Akismet in comment policy
Removed akismet class as it is now pulled in by composer
Merge pull request #113 from FelixOnline/akismet

Added akismet for spam checking and removed recaptcha