Added compare and grouping tools

Not sure if the sym link to the grouping tool works. Trying to check out how docker works without messing with Galaxy 101.
This is not a tool - this is just a tool wrapper. The tool is identified by the `command` tag of the wrapper (ie, `joinWrapper.py`). 
After the tool has been made available, the wrapper is what needs to be modified to used the dockerized version of the tool vs. the interpreter version...