Made the stroke width adjustable to a whiteboard size on scaling.

labs/meteor-client/app/client/views/whiteboard/whiteboard.coffee

@@ -7,6 +7,7 @@ Template.whiteboard.rendered = ->
       adjustedDimensions = scaleSlide(this.width, this.height)
 
       wpm = whiteboardPaperModel
+      wpm.setAdjustedDimensions(adjustedDimensions.width, adjustedDimensions.height)
       wpm.clearShapes()
       wpm.clearCursor()
       manuallyDisplayShapes()

labs/meteor-client/app/client/whiteboard_models/whiteboard_paper.coffee

@@ -368,6 +368,8 @@ class Meteor.WhiteboardPaperModel
 
   # Make a shape `shape` with the data in `data`.
   makeShape: (shape, data) ->
+    data.thickness *= @adjustedWidth / 1000
+
     tool = null
 
     @current[shape] = @_createTool(shape)
@@ -467,6 +469,10 @@ class Meteor.WhiteboardPaperModel
     newHeight = @adjustedHeight * heightRatio / 100
     @raphaelObj.setViewBox(newX, newY, newWidth, newHeight) # zooms and pans
 
+  setAdjustedDimensions: (width, height) ->
+    @adjustedWidth = width
+    @adjustedHeight = height
+
   # Registers listeners for events in the gloval event bus
   _registerEvents: ->