* exclude initial buffering time from freezing time
* fix the bug that last initial buffering seg will increase freezing time
* exclude initial buffering
+ probe mode
+encapsulate functions into MobTVWorkFlow class
* log stuck epochs
+Add server traffic estimation for time slots
* add column 'os' in output
* stuck time now contains session id
* fix os type output
Change default buffer size to 3
remove server_traffic_est.py
Add epoch_last_stuck and epoch_last_resume to simulation and output
Add bash scripts to import data using Mysql
fix wrong parameters in batch.sh
None value is output as \N for mysql import
remove the impact of initial buffer on epoch_last_resume
change stuck epochs output
Add sql scripts