[FEATURE] add oracle provider
oracle provider: fix connection settings
oracle provider: accept number(0) as key
oracle provider improvements:
- improve srs lookup
- insert crs to oracle table on import, if not existent (requires INSERT privilege on MDSYS.SDO_COORD_REF_SYSTEM)
- move table lookup into thread
- use QgsMessageOutput for import errors (also in postgres and spatialite)
- german translation update
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
port oracle provider to new_vector_api
+ progress dialog in progress dialog
+ fix for feature form from attribute table
Merge remote-tracking branch 'jef/oraclespatial-nva' into new_vector_api

Conflicts:
	doc/TRANSLATORS
	i18n/qgis_de.ts
	src/app/qgisapp.cpp
	src/core/qgis.cpp
	src/core/qgsvectorlayerimport.cpp
	src/providers/oracle/CMakeLists.txt
	src/providers/oracle/qgsoracleprovider.cpp
	src/providers/oracle/qgsoracleprovider.h