Lazy Loading Modules release fix

This patch fixes the CanvasWhiteboardModule importing the BrowserModule which messes up LazyLoaded modules used in Angular.

Now it only imports the CommonModule

Ng2 Canvas Whiteboard 1.1.1 release

This release fixes the CanvasWhiteboardUpdate serializeToJson() method. This method is also marked as deprecated and the method stringify(onlyShowCoordinatesAndType?: boolean): string should now be used.
This completes the 1.1.0 publish.
The module was tried out on an Angular 4 app and it did not fail to work

Full Changelog for 1.1.x:

• Added colorpicker
• Added touch support (did not work before)
• Added UNDO/REDO and their keyboard support
• Added resize handler which redraws everything on window resize