Clear matplotlib's font cache file at launch to prevent sandboxing violations when the app bundle was moved since the last launch. See

http://stackoverflow.com/questions/19675235/matplotlib-output-not-showing-up-inline-in-ipython-notebook-despite-pylab-inli/19676283#19676283

for details.
Reorder build phases so the XPC service gets embedded before the code-signing fix up script attempts to re-sign it.
Adjust the JS/jQuery code that manipulates the notebook U to remove some unwanted elements to match the changed DOM in IPython Notebook 1.0.
Also change the way the host app determines if the web view currently has a notebook page loaded by getting the UUID from the source URL instead of from a JS property. The JS property isn't ready yet right after the page loads.

Fixes #6