v0.10.4

Added

• Added lots of shield.io-badges
• Added support to use GitHub Updater
• Adding Travis-CI to begin experimenting with tests
• Adding check to edu.api.authenticate.php so we don't get warnings in travis
• Adding phpunit-tests to travis
• Added fix to session_start
• Redoing date limits for shown events. (Soon I'll have to make a setting for this)
• Updated readme.txt