1) add a logic to check min distance and redirect to hotel search directly. 2) abstract vars into OCBT.ini config gile
Use ordereddict rather than list+map
add filters for ean hotel result
move all the filters from helper to filter_helper
1) add thread_pool_manager to handle all the multi thread activities. 2) remove unused method from helper.
change log level from info to debug
Merge pull request #20 from manyan/master

Refactoring