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.
Remove alias from vector layer if it's an empty string
respect restrictions when calling identify with layer selection mode
fix zooming to layers when there are empty layers
[FEATURE][composer] Allow more control over appearance of composer arrows:
- Line can be styled using line symbol style dialog
- Arrow head fill and outline colors can be specified
- Arrow head outline width can be specified
[processing] convert strings to numbers when initializing parameters
from description file (fix #11011)
Finding python library on Ubuntu 14.04 64bit
follow up 4fb28987ba
[processing] don't warn about different CRS's if algorithm has only one
input (fix #10964)
Merge pull request #1527 from jarl-dk/build_fix

Finding python library on Ubuntu 14.04 64bit
Merge pull request #1458 from rouault/ogr_unknown25d

OGR provider: deal with wkbUnknown25D (wkbUnknown | wkb25DBit)
Let user change form layout in fields properties if .ui is not empty
Don't set field value to NULL if multiline text edit has not been edited
raster layer properties: add data url label
server: fix absolute path conversion on windows
[TRANSUP] common string update

Signed-off-by: Werner Macho <werner.macho@gmail.com>
typo fix in string

Signed-off-by: Werner Macho <werner.macho@gmail.com>
[TRANSUP] update sv, some context help fixes

Signed-off-by: Werner Macho <werner.macho@gmail.com>
Merge pull request #1481 from giohappy/alias_remove_when_empty

Remove alias from vector layer if it's an empty string.  Fix #10437
[FEATURE] New version of color button (QgsColorButtonV2) based off
QToolButton. Features:
- context menu items have been moved to the attached menu button
- new gui widget QgsColorSwatchGrid, which displays a grid of colors
- new class for QgsColorScheme, which generates colors to show in a
  color swatch grid
- new class QgsColorSchemeRegistry, with a global instance containing
  default color schemes. QgsColorButtonV2 accepts a color scheme
  registry, to control which schemes to show in the popup menu as
  color swatch grids.
- color button can have a default color
- color button can also be quickly set to a totally transparent color
- c++ and python unit tests for all core components