Merge pull request #3 from josephwright/master

Fix issue with renaming done by team
Adapt to changes in the LaTeX 3 kernel.

- Rename \lua_now:x to \lua_now_x:n (done by Joseph Wright)
- Bump version number
- Update copyright banner
- Update email address
- Special-case some warning that would otherwise break a test case
Use l3docstrip

Using l3docstrip makes private declarations much easier.
Bump version number to 1.0.
Reindent.
Fix Google Groups link (was redirect).
\Umathcharnumdef is now available, but we still cannot use it because of a bug in \Umathcodenum.

Trying to use \Umathcodenum instead breaks the icomma unit test.
Add fix and unit test for amsopn package.

Fixes #5
Mention amsopn package in the README file
Update MANIFEST file
create German version of documentation
provide German translation
don't print index for German version
reindent language environments normally
fix typo
Merge branch 'multilang'
Two function names updated to match changes in expl3
Use \__chk_if_free_cs:N in place of \chk_if_free_cs:N

Ideally, this would not be used at all. However, expl3 does not currently
cover the types of information checked here. As this is a patch from me to
a third-party, the minimum change seems appropriate.