adding changelog

Hey, it would be nice if we started keeping a changelog to explain what changed between versions.  Here is my token attempt to start one.
i18n: http://en.wikipedia.org/wiki/Internationalization_and_localization
I actually never knew why it was called that, but it's the name of the thing we use for translations.
> ...frequently abbreviated to the numeronym i18n (where 18 stands for the number of letters between the first i and last n in internationalization, a usage coined at DEC in the 1970s or 80s)