Add new targets to allow running extension from unjarred directory
Add new targets to allow running extension from unjarred directory

This is almost certainly not the best way to achieve what I wanted,
but it works in a clunky sort of way.  The unjar-chrome target
will unzip the previously created chickenfoot.jar file, and modify
the manifest file to use the expanded directories rather than the
jar file.  The run-debug-no-install target is just like the
run-no-install target, except that it also runs unjar-chrome.  The
biggest issue with this is that time is wasted zipping up and then
unzipping the jar file, when it should ideally never be created in
the first place.

bolinfest/chickenfoot,bolinfest/chickenfoot,bolinfest/chickenfoot,bolinfest/chickenfoot,bolinfest/chickenfoot