Added highlighter tool/widget. Added FlashCanvas initialization.

1. Added highlighter tool & widget. Extends the line tool to give users
a
translucent highlighter effect.
2. Uses FlashCanvas library to support LC in IE8.

set highlighter color to fixed yellow.
Basic Stamp Tool Support

fix defect in stamp tool options display

also, remove non-working call to select default stamp.

remove unintended changes so i can merge back to master

1. changed name of var in ImageShape de/serialization
2. removed bits for using a fillImage in the stamp background until the
feature is done.
Stamps Not Appearing on reload defect

make sure the image calls repaint on the canvas when it gets loaded
from JSON.