move zoom/pan routine in Canvas class, enable pan limits
prototype a zoomer
zoom bad formula
working zoomer
implement intermediate drawer
start drawable class
rect drawer
add shared headers
finish zoom
add canvas border, enable object saving, remove drawer class
add ellipse drawer, add toolbar prototype
add colorpickers, create a place to store drawing options
remove console messages
add UI elements with icons
enable the zoom, ellipse and rectangle tools
enable the zoom, ellipse and rectangle tools
implement shift key constraint
start work on bezier
Add readme and a screenshot
Merge branch 'lab3dev'