Update Relative_distribution_(distance_covariate).rsx
Create Advanced_raster_histogram.rsx
allow for expressions in symbol rotation and scale
the single, graduated and categorised symbol renderers have been
refactored to avoid use of raw pointers (auto_ptr are used instead, they
are deprecated in c++11 but the change for unique_ptr is an easy one and
they clearly state the design intend: exclusive ownership)

2 general use function to quote and unquote strings for/from xml have
been added to qgis.h
changed std::auto_ptr for QScopedPointer
#9060: define global unit conversor
#9060: use QGis::fromUnitToUnitFactor in QgsWmsProvider

 in
#9060: use QGis::fromUnitToUnitFactor in QgsDxfExport

 in
#9060: use QGis::fromUnitToUnitFactor in QgsDistanceArea

 in
#9060: use QGis::fromUnitToUnitFactor in QgsComposerScaleBar
#9060: use QGis::fromUnitToUnitFactor in QgsDecorationScaleBar
#9060: use QGis::fromUnitToUnitFactor in QgsGrassGisLib
#9060: Enable degrees as valid DisplayUnit in QgsOptions dialog
fixed bug in rotation & removed xml encode/decode
fixed toSld() & replaced "" by QString
fix bug in max value on joined fields
UI: dialog base: add current category to dialog title
#9360: fix bug simplification when transform is activated
Merge pull request #1086 from ahuarte47/Issue_9360

fix bug whole layer not rendered (when simplify geometry activated; fixes #9360)
Merge pull request #1056 from ahuarte47/Issue_9060_B

[Feature]: Centralize conversion units in one unique function
Export labels to dxf