Correct references to config files

A few places still made relative references to config files, these should
should look in /etc/quattor-datawarehouse/ instead.
Split qdw.py into two seperate scripts

The motivation for this is to keep indexing and queries seperate, in many
cases the profiles and web interfaces will be on seperate servers anyway.
Merge branch 'split-functionality' of github.com:jrha/data-warehouse into split-functionality