Fix of visible checkbox for map layer display

* Modified check/uncheck behaviour on refresh
* Updated labels and comments

(closes OpenFLUID/openfluid#384)
Fix of error message when overwriting files using OGR

* Added previous removing of files before overwriting
* Added dialog box when overwriting files, the user can cancel
  the operations before overwriting
* Updated labels and translations
  
(closes OpenFLUID/openfluid#387)
Add of messages in dashboard when model or monitoring is fully disabled

* Added error when no simulator or generator is enabled
* Added warning when no observer is enabled
* Improved layout of dashboard messages
* Updated labels and translations

(closes OpenFLUID/openfluid#357)
Update of minimal required version for CMake, now is 2.8.9

(closes OpenFLUID/openfluid#69)
Cleaning of AUTOMOC usage in CMake config files

(closes OpenFLUID/openfluid#376)
Fix of later crash when trying to open a wrong project

* Disabled checking of unique items in AdvancedModelDescriptor
* Fixed memory leaks and bad memory releasing
* Cleaned code

(closes OpenFLUID/openfluid#317)
(closes OpenFLUID/openfluid#323)
(closes OpenFLUID/openfluid#361)