Add QGIS_PROJECT_FILE environement option

To be able to configure the project file in apache configuration
like:
SetEnv QGIS_PROJECT_FILE  <path to project file>.qgs
More general string value.

This option is used for GetFeature and GetfeatureInfo
And for WKT and GML format
Run scripts/update_ts_files.sh
Add French translation
Allow rotation +-360 degrees in ellipse marker widget
Merge pull request #887 from sbrunner/environ_mapfile

Add QGIS_PROJECT_FILE environement option
Merge pull request #889 from sbrunner/string

More general string value. …
fix retrieval of PYTHON_SITE_PACKAGES_DIR - broke debian builds
Fix crash in rule paste
Paste rule at the bottom if no selection
Use scale parameter to display concerned class
Fix class name
Use OGC standardized scale denominator