don't reload the whole browser model when the project home changes (fixes #7520)
allow credential requests from threads
oracle provider:
- make searching in meta data table default
- also list synonyms
- more progress messages
postgres provider:
- move available table detection to thread
- more progress messages
german translation update
Add rand and randf functions for generating random numbers
Small fixes to function help
Add regexp_substr function for returning matched part of string against regex
Add max and min functions
Add floor and ceil functions
Add abs function
Add trim function
Add a scale_linear function, for linear interpolation between and input domain and output range
Merge pull request #587 from nyalldawson/new_functions

New functions
sip does not like CORE_EXPORT and Q_OBJECT
Improve WMS server performance
Small performance improvement in gdal provider
[Fix #7798] (I)LIKE operator escapes regexp characters before computing regexp
[attrtable] Update title when filter column query changes
[Fix #7784] Browser keeps crashing when navigating the tree