Fix _getTransitiveClosure: there was maximum one parent class in the list

But if you have more than one parent class on top, with this fix all of
them are now in the list.
Fix syntax error when short_open_tag is enabled
Increase security by preparing all statements in Virtuoso store adapter.
Increase security by preparing all statements in Virtuoso store adapter.
Disable prepared statements for now since there were problems with ODBC-link resource.
Enable API documentation.
Add support for full action URIs
avoid prefixes for http://, https://, …
Add getBaseIri to ModelStub
Try to fix build.
Try to fix build.
Fix query2 parser star select issue

Variable were parsed by the parser class but never added to the query
object. Projection vars are now added to the object thus fixing the
resulting * queries.

This fix introduced another issue which was also fixed. When no
visible graph is found, the store invalidates the query by settings the
where clause to a false filter. Virtuoso does not like such queries
that have a valist in the select clause. It crashes with a out of mem
error. This was fixed by also settings the varlist to * again when the
query where clause gets falsified.
correcting code documentation in Database cache backen
Merge pull request #52 from kkda/feature/short_open_tag

Fix syntax error when short_open_tag is enabled
Merge pull request #48 from k00ni/fix_getTransitiveClosure

Fix _getTransitiveClosure: there was maximum one parent class in the list
fixing Virtuoso _execSQL function. Someone before forgot to add an @, which leads to warnings in the Cache
Merge branch 'develop' of github.com:AKSW/Erfurt into develop
fixing #58 by flatten the array
correcting documentation in QueryCacheFrontend
Fix coding standard for Turtle Adapter