working on moving ui out of testApp
take UI code out of testApp level
add color and linewidth slider
merging
Merge branch 'master' of https://github.com/ofZach/zoomDraw

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.
updated ui color and slider hooked