Merge pull request #2 from pgeorgi/configs

Fix content-type for download
I18n - Internatialize login screen and prepare modules
Merge branch 'master' of https://github.com/churchtools/churchtools_basic
Add unit tests for i18n library

In fact, move the existing examples that reside in a comment so
that they can be run.

To execute, execute in the toplevel directory: (phpunit must be installed)
$ phpunit .