more oracle provider improvements:
- enable warnings and more error handling in qocispatial
- read ordinates in one go (OCICollGetElemArray/OCINumberToRealArray not working yet)
- set prefetch count
- fix support for int keys (numbers with precision 0)
- interpret oracle crs without auth_name as EPSG
Add mousePressEvent to QgsMessageBar sip file
Reorganize Options dialog

- Add Data Sources, Canvas/Legend sections
- Fix excess whitespace issue for list widget pane in QtDesigner and QGIS
- Switch GDAL drive table load to happen relative to current page name