- Added method toPhp to DB_Model to convert array and boolean types from PostgresSQL to php
- Added method execQuery to DB_Model to execute a query (it calls toPhp)
- Added method pgsqlArrayToPhpArray to convert a pgsql array to php
- Updated DB_Model methods to using chkRights (and toPhp where it is needed)
- Removed methods escapeArray and _pgsqlArrayToPhpArray from controller APIv1_Controller
- Removed escapeArray from controllers Dokumentstudiengang and Dokument
- Updated models to use execQuery (and chkRights where it is needed)