Extending README.md.

git-svn-id: https://www.coling.uni-jena.de/svn/jules/trunk/jules-token-ae@8133 7ac257a9-6a28-0410-b245-f828558649ed
Preparing project to use the maven assembly plugin.
Merge branch 'master' of https://github.com/JULIELab/jules-token-ae