Revision 2826

File format dtd is now thuban-1.2.1.dtd. Fixed tests for this.

* Resources/XML: Renaming thuban-1.2.0.dtd to thuban-1.2.1.dtd
as Thuban 1.2.0 actually used 1.1-dev.dtd.

* Resources/XML/thuban-1.2.1.dtd: Enabled keyword expansion again
so that the header is clean now, bumped copyright to 2008.

*  Thuban/Model/save.py: Using thuban-1.2.1.dtd now.

*  Thuban/Model/load.py: Added  thuban-1.2.1.dtd instead of 
thuban-1.2.0.dtd as recognised file formats.

* test/test_save.py, test/test_load.py: Using thuban-1.2.1.dtd now.