start of stroke manager
Draw pencil tool with smoothed strokes
Extend stroke manager for pressure, position and mouse events

Add pressure handling to stroke manager
Add release/press/current position tracking to stroke manager
Handle mouse events directly
Delegate more stuff to stroke manager
Add key event handling to basetool
Add point handling directly to polyline tool, and cleanup scribble area a bit
Better handling of dependencies in pro file
Fix crash when using pentool/penciltool on camera layer
Actually use the correct syntax to evaluate a variable in pro
Have pentool use the interpolated stroke too
Introduce stroketool abstraction and make pen/pencil/eraser use it
*now* finally fix the dependency updating issue
Added blitrect util
Updated brushtool to use strokemanager
Remove drawLineTo method as it is now handled by the tools themselves
Merge branch 'bug/autosave-window-popup' into feature/stroke-manager

* bug/autosave-window-popup:
  Update current file path after saving
initialized nQueued_p to avoid crashes
Fix display of eyedropper tool cursor
Rename members of scribblearea and add accessors to clean up the interface
Add drawing helpers to scribblearea