Added support for Fedora 17

Bug fix update to fix problems with the first run not adding existing events & requirement for libecal-1.2-dev to be installed rather than libecal-1.2.

Version 0.3 uses js-ctypes rather than python scripts to add events to Evolution Mirror. This makes the extension more responsive and less prone to locking up Thunderbird when adding lots of events to Evolution. It also gets rid of the reliance on the python-evolution package that was need in previous versions. As a result of this, the extension may not work on versions of Evolution before 3.0. Users of this version of Evolution should continue to to use version 0.2.3 of this extension.

Ubuntu user may wih to note that this extension is also now hosted in a PPA at https://launchpad.net/~markjtully/+archive/ppa as a package named xul-ext-evolution-mirror. If you wish to install the extension using the PPA instead, you should first uninstall the version obtained from addons.mozilla.org.

Updated to allow proper installation in Thunderbird 5