I18n branch merged to trunk

The i18n branch (intl-branch) has been merged to the trunk. To build this, you need to use boot-2010-02-1.lisp as the bootstrap file with build.sh. You may also want to use the -P option for build.sh to generate/update the po files with any new strings. There's an updated Pig latin (machine) translation that includes translations for all strings in CMUCL. Currently, hemlock, clx, and clm are not translated. It might be nice to support clx, but since that is from an external source, I'd rather not touch it. I've test this briefly on Mac OS X and Linux, and only with the unicode builds. Everything seems to be working. Ray