Turned off syntax highlighter for text files.
System must accept 4-letter logins too.
Now registration page can 1) login the user 2) register the new user and 3) attach client uuid to the user. It even can do all three things at the same time. The only problem is that the code in user_register_handler action became not very nice.
Merge pull request #91 from powder96/master

More stuff for users and also fixed syntax highlighting for text files.