[NGRINDER-499] Add jython-standalone-2.5.3.jar as default lib
[NGRINDER-479]
- Make not to wait until each file distribution is finished.
  * It might not be safe.. But it really speeds up file dist 10 times
faster.
  * I added safe file transfer option in perftest for who want to
transfer them in safer way.
- Make jython cache in the tmp directory so that each test run reuse
those cached libs.
- PerfTest execution frequency faster. 2sec ==> 1sec.
[NGRINDER-487] Clean up checkstyle issue.
Release preparation
[NGRINDER-500] Make it fail only if half of tests are failed
prepare release
[NGRINDER-479] 
- Do not wait until file dist cache become stable in speedy
distribution.
- Provide the safe dist mode for the large file distribution.
[NGRINDER-499] Add missing dependency.