Rename runtime->string in runtime.scm

Rename runtime->string in runtime.scm so as to not shadow the Kawa
version.

Change-Id: I17d3896b49c927ce1cbd88036b0e070e08ef669b
Add pointer to XML documentation in reference -> other

Change-Id: I563df2689710e33691cc11715a4cf63b3b61c676
Improved Chinese Translations

Improve the Simplified and Traditional Chinese translations from Joe
Chuang and Fuming Shih.

Change-Id: I8eeb46a22adab18341d4560a6d947499677059c6
Fixed prop panel renaming issue

Change-Id: Ib75fff8a2caad9f61ed64ec8f6c329a53321076b