Merge pull request #56 from phillipCouto/master

Return Error when user provides an empty array for hosts
Added error codes
If the prepared statement does not exist on server, re-prepare it
Fix deadlock
added links to the new mailing list / google group
Merge branch 'reprepare-statement' of git://github.com/ChannelMeter/gocql into reprepare
First cut at adding CAS statements
No need to make the caller supply the CAS flag in the binding statement
Update AUTHORS
cleaned up CAS branch a bit
better test cases