Fixed bad compile of filter exp
Fixed flush stdout
Fixed cmp_boxes_safe for combination of DV_STRING and DV_UNAME
Fixed DB.DBA.RDF_DATATYPE_OF_xxx() procedures
Fixed comment
Fixed write past end of buffer
Fixed issue with scalar
Added optimization for top
Fixed support for mixed types in concatinate
Fixes for RDF graph security

* Added function for re-loading RDF graph security
* Added function for grouping cache
* Minor fixes
Fixed divide by zero error on allocation of size 0
Merge branch 'develop/6' into develop/7
Fixed issue with SPARQL 1.1 BIND and 1+ graph assigned to default graph
Fixed use constants instead of boxes
Fixed issue with SPARQL AVG and integer values
Fixed labels
Fixed remove order by and distinct as they are irrelevant and kill performance
Fixed visibility of aggregate links
Fixed labels
Disabled fct max timeout