Upgrade version in development branch.
Move SVG drawer to drawing.js, and fix a fieldOfView error.
Create canvas independent DrawProjectedBody function.
Code cleanup in SVGViewer.
Store drawer in SVGViewer.
Make hiddenLine and clear as the constructor parameter of DrawSettings.
Correct SVGViewer events.
Move drawing.js to extras.
Move some other functionality to extras.
Replace hiddenLine to drawMode in SVGViewer.
DrawProjectedBody refactor.
Add HiddenLineFrontFacing mode to viewer.
Rename SVGViewer to SoftwareViewer.
Add CanvasDrawer to SoftwareViewer.
Merge branch 'development'