Release 1.0

Finally, here it is. :)

Note that the so-version is 2.0.0. This is because Wan Leung's
libcangjie was already using the 1.0.0 so-version, so we should bump to
indicate that we are not compatible.
Merge pull request #43 from Cangjians/1.0

Yup, that's a 1.0