Avoid mistakes by using COMMON_O for all targets.

The COMMON_O was missing in create_classes.
Big documentation changes.

- Add Install
- Generate MANUAL and INSTALL directly to the repository.
- Modify txt2tags to perform text reflow on txt TARGET.
- Add new_czech_tokenizer API call
- Various documenttation updates.
Change author emails to use the department domain.
Update README so it can be used in the released packages too.
Java bindings clean target cleans examples too.