Update foerster-geisteswissenschaft.csl

- I have added functionality for "entry-encyclopedia". Column locators instead of pages are supported.
- The bibliography is now sorted by author, then year and lastly by title, after some users asked for this via email.
- I corrected some translations.
- I corrected and updated the documentation.
- I added terms for CSL 1.0.1
- It's now possible to change from em-dash to regular dash for the pages.