Qml localStorage initialization

* initialization (create table)
* user application name (identifier)
* add defaultValue argument to getSetting

Fix #66
use plugin label instead of plugin identifier in menu and search bar #71
fix a minor typing error

buttleofx/MainWindow.qml:48: ReferenceError: rs is not defined
hint window is resizable and its widgets too #70
remove useless splitview of paramTutteEditor
GraphEditor: right click on nodes use a window Item #73

still a problem when the toplevel window's size change
fix bug of display of paramButtleEditor
Quick view : add node doesn't remove existing nodes #58

+ remove useless code
Merge branch 'dev_menu' of github.com:buttleofx/ButtleOFX into develop
browser: use sequenceParser EType enum
Node search bar: no longer use label and identifier but label and label.lower #83
Node creation: directly set position and connect node if there is exactly one selected node #85
don't connect the createdNode to the selectedNode if the createdNode have no clip input
Merge branch 'dev_browser' of https://github.com/buttleofx/ButtleOFX into develop
Merge branch 'dev_menu' of github.com:buttleofx/ButtleOFX into develop
add SIGINT for KeyboardInterrupt exceptions
peanuts: fix spaces
browser thumbnails: add loading display
fix imageProvider

* use specific internalMemoryCache to avoid using the same cache across
multiple threads (need to update TuttleOFX)
* change thumbnails size to 256
* choose the time to render (middle frame if the frame exists)
* test multiple readers if there is an error
* return an empty image if we can't load the image
Minor Fix for an error messages
still 4 errors at the execution