Merge pull request #6 from slarosa/master

Update readme file
- add contributors
- translate into md syntax
Merge pull request #7 from slarosa/master

enable alternating rows color for layers tree widget
Project Checking - relative path debug

Use the provider type to check only local files for relative path
Remove spatialite layers relative path control
Annotation - Allow the user to use PostGreSql layers
Synchro with LFTP - add --use-cache parameter
Tools tab - addition of permalink and measure checkboxes

* add these 2 tools : permlink and measure
* deactivate the group of tools : these tools are not implemented in lizmap web client yet
Map tab - always write minScale, maxScales, etc. in config file
Map tab - changes on map tools and map scales

* Complete refactoring of the code for global map options : a python dictionnary is used
* Get rid of permalink checkbox
* Reorganize map scales : get rid of the complicated choice between min/max and scales
Change needed projection 4 external layers: 900913(deprecated)->3857
Translation - update compiled language files
New - Configure Client browser Cache expiration
Prepare release for 1.8.0
Handle Windows issue when using multiple drives

* Basic error handling for relative path verification
Minor changes in metadata and changelog files
italian translation update