[Qgis-developer] [QGIS Server] Add short name to layers, groups and project

[René-Luc Dhont]

Hi Marco, Devs and QGIS server users,

I published a pull-request to 'Add short name to layers, groups and 
project' https://github.com/qgis/QGIS/pull/2549

A number of elements have both a <Name> and a <Title>. The Name is a 
text string used for machine-to-machine communication while the Title is 
for the benefit of humans. For example, a dataset might have the 
descriptive Title “Maximum Atmospheric Temperature” and be requested 
using the abbreviated Name “ATMAX”.

User can already set title for layers, groups and project. OWS name is 
based on the name used in layer tree. This name is more a label for 
humans than a name for machine-to-machine communication.

To add the capability to users to define Name as a text string for 
machine-to-machine communication, this pull-request adds:
* short name line edits to layers properties
* WMS data dialog to layer tree group
* short name line edits to project properties
* add a regexp validator "^[A-Za-z][A-Za-z0-9\._-]*" to short name line edit

If a short name has been set for layers, groups and project it is used 
by QGIS Sever as the OWS name.

Add a short name lets not need to create a specific project for web 
publishing. This will have an impact for QGIS Web Client and Lizmap. But 
will be usefull to publishing more normalize OGC Web Services (ISO and 
INSPIRE).

Marco, can you review the code ?
Test and feedback are welcomes.

Regards,
René-Luc