added config table to database chart
Merge branch 'doc' of https://github.com/SRSoftware/OpenCloudCal into doc

Conflicts:
	doc/database.dia
tag class copied and altered for urls
removed unused line
started to create url methods in appointment class
added removeUrl methods
implemented adding of urls
added description to appointment_urls
some corrections, added appointment.save method
added test.php
Merge branch 'doc' into devel
Merge branch 'master' into devel