Changes:
1. Fixed the session unregister code in the Products Ship Estimator (Thanks to Jim Bullen for spotting this bug)
2. Added more buttons (thanks to James Ballenger for providing these)
3. Clarifications to the instructions in the readme.txt
4. Added the Spanish and Italian language files (Thanks to Virgilio for the translations)
4. Added the French language files and buttons (Thanks to vanessa for the translations)


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