一个圣人字组合包（合并在圣人3.2.2）

This is a project to implement a complete package for word manipulation and combinatorics under SAGE. NEW NEW NEW **We are proud to annonce that the sage-words library was merged into Sage in December 2008. It can be obtained via sage 3.2.2 and future releases. There are still a lot of projects and improvements to be done in the sage-words library but those will be done under the sage and sage-combinat development models. In particular: all bugs should be reported on the [sage trac server](http://trac.sagemath.org/sagetrac)._**