Optional automatic save of projects in OpenFLUID-Builder

* Added an option to automatically save the current project 
  before running simulations
* cleaned preferences dialog design  
* Cleaned code

(references OpenFLUID/openfluid#246)
CMake hack to avoid conflicts between Qt moc and boost libraries

(references OpenFLUID/openfluid#246)
Refactoring of the dashboard in OpenFLUID-Builder

* Added dashboard widgets for project informations and status
* Redesigned of dashboard and toolbar
* Added helper methods in descriptors
* Cleaned code

(references OpenFLUID/openfluid#246)
Project checking in OpenFLUID-Builder

* Completed checking process
* Added signals to trigger project checking when needed
* Updated design of dashboard
* Cleaned code

(references OpenFLUID/openfluid#246)
Variables names display in model view in OpenFLUID-Builder

* Added transparent background to variables names in model view

(references OpenFLUID/openfluid#246)
Fix of project checking in OpenFLUID-Builder

* Fixed check of attributes production/requirements

(references OpenFLUID/openfluid#246)
Rough view for spatial domain in OpenFLUID-Builder

* Added table for view of spatial domain information
* Cleaned code

(references OpenFLUID/openfluid#246)
Rough view for datastore in OpenFLUID-Builder

* Added table for view of datastore information
* Cleaned code

(references OpenFLUID/openfluid#246)
Ability to create/open a project in OpenFLUID-Builder

* Added ability to open or create a project 
  when a project is already open
* Cleaned code

(references OpenFLUID/openfluid#246)
Update of About dialog

* Updated switch link for license/credits

(references OpenFLUID/openfluid#246)
Fix of recent project opening in OpenFLUID-Builder

* Fixed ability to open a recent project when a project is already open
* Cleaned code

(references OpenFLUID/openfluid#246)
Zoom capabilities in model view in OpenFLUID-Builder

* Added zooming using the mouse wheel
* Added buttons for zoom fit and reset 
* Added ModelView class for management of the graphical model view

(references OpenFLUID/openfluid#246)
Fix of install configuration in CMake files for OpenFLUID-Builder

(references OpenFLUID/openfluid#246)
Fix of OpenFLUID-Builder toolbar stylesheet, for MacOSX compatibility

(references OpenFLUID/openfluid#246)