Improve padding and alignment in the table

See #470.
Replace icons with better ones.

See #362.
Update .gitignore
Make the workspace chooser sexier

Now the folder combo box is a fixed width of 230px, which should fix the
problem described in #353.

Translations have been added.
Merge pull request #513 from agouge/353

Make the Workspace Manager sexier (#353) nice pr
Select a style's layer in the MapEditor.

Fixes #514.
Add some warning messages if nothing can be done

Add warning messages if:
    * No layers could be selected
    * A selected layer has no selected geometries

Translations included. Also fixed some translations by using '' instead
of '.

Now when multiple styles are selected in the TOC, we add all the
corresponding layers, not just one.
Merge pull request #515 from agouge/514

Fix datasource from selection in the Map Editor when style(s) are selected in the TOC (#514) 

Now creating a datasource from selection in the MapEditor works even when a style is selected in the TOC.

Fixes #514.


In the Map Editor, if you select a layer's style (and not the layer), select some geometries, then try to create a datasource from the selection, then nothing happens.

This is partially related to #124.
Merge pull request #507 from agouge/470

Improve padding and alignment in the table (#470)
Merge pull request #512 from agouge/362

Replace icons with better ones (#362)
Fix #500 : the viewbox was set to 0 if one dimension was negative.
All that because of a comparison problem.
Related to #499 - removes arbitrary set in MarkGraphic#draw.
The new behviour is coherent with what is stated in the norm. Note that
the expected behaviour may change.
Related to #496. setStroke was not called on the good UomNode.
Fix the rendering of some MarkGraphic instances.
The objects returned by WellKnownName#getShape were sometimes invalid.
Indeed, Arc2D, Ellipse2D and Rectangle2D expect to receive positive
width and height. Considering symmerties in these objects, I've tried to
use Math.abs when it was possible. The leftmost x-ordinate and the angle
of the HalfCircle have received a special treatment.
Merge pull request #521 from agueganno/uom-problem

Small fixes in the renderer/legend.

Fixes #496. Fixes #499. Fixes #500.
Remove monomap artifact id
Merge remote-tracking branch 'origin/master' into orbisgis-h2