Merge pull request #1 from skydevment/master

PDO Fix
- class.database.php Line 12 Fix
Merge pull request #1 from skyLaboratory/master

PDO Fix
Vertretung Complete
Merge pull request #2 from skydevment/master

class.room.php
Database outsourced
Merge pull request #2 from skyLaboratory/master

room Support
Merge pull request #3 from 3delStahl/master

Database Outsourced to sky-lab.de, Lehrer->Freistunden zurodnung
Merge pull request #2 from skyLaboratory/master

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