CDH4 port

Changes include:
* Porting HiBench to CDH4.
* Cange the report format.
Update README.md
Add Counters.java
Update README.md
fix bug in funcs.sh
Merge pull request #7 from zkld123/master

fixed a bug in funcs.sh
Remove unused directories from mahout distribution to solve problems when unzipping compressed project downloaded from github.