Merge branch 'master' into threading-revival

Some features are still disabled - will be fixed later

Conflicts:
	python/core/composer/qgscomposition.sip
	python/core/diagram/qgsdiagram.sip
	python/core/diagram/qgshistogramdiagram.sip
	python/core/diagram/qgspiediagram.sip
	python/core/diagram/qgstextdiagram.sip
	python/core/qgsdiagramrendererv2.sip
	python/core/qgsfield.sip
	python/core/qgslabelsearchtree.sip
	python/core/qgsmaprenderer.sip
	python/core/qgsrenderchecker.sip
	python/core/symbology-ng/qgssymbollayerv2.sip
	python/gui/qgsmapcanvas.sip
	src/app/composer/qgscomposerlegendwidget.cpp
	src/app/qgisapp.cpp
	src/core/composer/qgsatlascomposition.cpp
	src/core/composer/qgscomposerattributetable.cpp
	src/core/composer/qgscomposermap.cpp
	src/core/composer/qgscomposition.cpp
	src/core/composer/qgscomposition.h
	src/core/diagram/qgsdiagram.h
	src/core/diagram/qgshistogramdiagram.cpp
	src/core/diagram/qgshistogramdiagram.h
	src/core/diagram/qgspiediagram.cpp
	src/core/diagram/qgspiediagram.h
	src/core/diagram/qgstextdiagram.cpp
	src/core/diagram/qgstextdiagram.h
	src/core/qgsdiagramrendererv2.cpp
	src/core/qgsdiagramrendererv2.h
	src/core/qgsmaprenderer.cpp
	src/core/qgsmaprenderer.h
	src/core/qgsnetworkaccessmanager.h
	src/core/qgspallabeling.cpp
	src/core/qgsrenderchecker.h
	src/core/qgsvectorlayer.cpp
	src/core/qgsvectorlayer.h
	src/core/qgsvectorlayerfeatureiterator.cpp
	src/core/qgsvectorlayerfeatureiterator.h
	src/core/raster/qgsrasterlayer.cpp
	src/core/symbology-ng/qgscategorizedsymbolrendererv2.cpp
	src/core/symbology-ng/qgsgraduatedsymbolrendererv2.cpp
	src/core/symbology-ng/qgsmarkersymbollayerv2.cpp
	src/core/symbology-ng/qgssinglesymbolrendererv2.cpp
	src/core/symbology-ng/qgssymbollayerv2.cpp
	src/core/symbology-ng/qgssymbollayerv2.h
	src/core/symbology-ng/qgssymbolv2.cpp
	src/gui/qgshighlight.cpp
	src/gui/qgsmapcanvas.cpp
	src/gui/qgsmapcanvas.h
	src/gui/qgsmapcanvasitem.cpp
	src/gui/qgsmaptoolidentify.cpp
	src/plugins/georeferencer/qgsgeorefplugingui.cpp
	src/providers/memory/qgsmemoryfeatureiterator.cpp
	src/providers/ogr/qgsogrfeatureiterator.cpp
	src/providers/ogr/qgsogrfeatureiterator.h
	src/providers/ogr/qgsogrprovider.cpp
	src/providers/oracle/qgsoraclefeatureiterator.cpp
	src/providers/oracle/qgsoracleprovider.cpp
	src/providers/postgres/qgspostgresconn.cpp
	src/providers/postgres/qgspostgresfeatureiterator.cpp
	src/providers/postgres/qgspostgresfeatureiterator.h
	src/providers/wfs/qgswfsfeatureiterator.cpp
	src/providers/wms/qgswmsprovider.cpp
	src/providers/wms/qgswmsprovider.h
	src/ui/qgsoptionsbase.ui
	tests/src/core/CMakeLists.txt
	tests/src/core/testqgscomposereffects.cpp
	tests/src/core/testqgscomposerhtml.cpp
	tests/src/core/testqgscomposerscalebar.cpp
	tests/src/core/testqgscomposershapes.cpp