Add new comparison operator 'gt', 'lt', 'gte' and 'lte'
* src/tsung_controller/ts_mon.erl: remove the commas in tsung.dump
  file header, replace them with semi-colon
fix tcp data: set {active, once} for saved socket, add tcp_closed event processing
fix bug for websocket close frame
parse the closed response, not just wait a ack
add ack attribute for message request of websocket
add example for websocket session
refactor decode_buffer to remove unnecessary code
Merge pull request #58 from rodo/bugfix

* src/tsung_controller/ts_mon.erl: remove the commas in tsung.dump
Merge pull request #57 from rodo/comparison

Add new comparison operator 'gt', 'lt', 'gte' and 'lte'
Add index entry for _cpu_
Merge pull request #61 from rodo/master

Add index entry for _cpu_
Merge pull request #59 from onlychoice/fix_ws

some improvements to websocket plugin and bugfix