Use a QDoubleSpinBox instead of a QLineEdit for the snapping
 tolerance, make the treeview columns adjust better to the size of the
 contents
OGR provider: deal with wkbUnknown25D (wkbUnknown | wkb25DBit)

This geometry type doesn't exist admitedly in the OGRwkbGeometryType
enumeration but a few OGR drivers can expose layers of this type.
Those layers should be dealt exactly like wkbUnknown layers, i.e.
QGIS should analyze the content to see if there are points, lines,
polygons and create derived layers.

Also report the geometry type of wkbGeometryCollection25D layers in
the U.I.
Use GEOS reentrant API (_r functions) and update requirement to GEOS >= 3.1.0

Currently QGIS uses the 'classic' GEOS API that uses a global context.
This can conflict with libraries that would also use the global context
and potentially finalize it whereas QGIS will still use it later.

See https://groups.google.com/forum/#!topic/spatialite-users/9YSU6c5AVQ4 for
such an example of such a recent issue with Spatialite.

The _r API is available since GEOS 3.1.0, which is already an ancient GEOS
version. For example, old-old-stable Ubuntu (Lucid 10.04) and Debian (squeeze)
ship with GEOS 3.1.0 or later.

Such move has also been done in GDAL 1.11
(http://lists.osgeo.org/pipermail/gdal-dev/2013-August/036877.html)
and MapServer 7.0 (https://github.com/mapserver/mapserver/issues/4733)

There's no easy way unfortunately to check at compile time that you don't
use the non _r API. I have patched my geos_c.h header to #ifdef that API (quite
painfull to do..). A postprocessing check can be done however with :

objdump -T output/lib/*.so | grep -v Base | grep GEOS | grep -v _r | grep -v "_ZN" | grep -v GEOSversion

It should return nothing.
Remove alias from vector layer if it's an empty string
CSV acronym added for consistency other file types
Apply pull request #1502 provided by bstroebl: Add ntv2 entry for Thuringia
do not transform toString to quote values (NULL integer becomes 0 otherwise)
[FEATURE][composer] Implement an item tree panel for composer windows
(fix #4358). Allows for selection of items, hiding/showing items,
toggling lock status of items and double-clicking to edit item id.
Don't double add features
Fix #10969
[composer] Remove right-click to lock for composer items (fix #5592), now that locked items can be unlocked from the items panel this is no longer required, and frees up right clicks for a composer context menu
[composer] Locked items can't be selected by clicking them in the canvas.
[composer] Deselect items when they are locked from the items panel
[composer] Decrease default snap tolerance to 5 pixels
fix editing of NULL values (fixes 0 to NULL, and fixes setting of NULL values in postgres)
Fixed Legacy date widget default format
[composer] Don't deselect items when unlocking them from the items panel
[composer] Some tweaks to label display name, add display name for legends
[processing] replace str() with unicode() to avoid possible issues with
non-ASCII characters (work in progress)
[processing] fix loading of output rasters with wrong CRS
debian packaging update