Merge pull request #126 from aiannacc/prerelease-bug-fixing

Prerelease bug fixing
Increment version to 2.3.4
Don't send empty chat messages

If I press Enter while the chatbox is empty, I don't mean to send an empty message: it's just a reflex from chatboxes that require you to press Enter to open them.
Merge pull request #127 from amalloy/patch-1

Don't send empty chat messages
Merge pull request #129 from aiannacc/prerelease-bug-fixing

Prerelease bug fixing
Merge branch 'master' into prerelease-bug-fixing