cewolf-0.6.1 released

Notes:
This is a patch release which fixes an error in the TLD of 0.6.
It does not contain the examlpe .war file. If you want to build the example war:
1. put servlet.jar, jaxp.jar into /lib
2. run ant target war.

Changes:
- fixed a bug in the tag library descriptor which defined the background attribute of tag chart as a float instead of String