Merge pull request #30 from samzhao88/develop

create war file and support sql
recent changes
fixed conflicts
Merge pull request #31 from snickers2029/develop

Recent updates
create graph
Merge pull request #32 from snickers2029/develop

create graph
updated flightroute and flightRouteSet to support score compution
Merge pull request #33 from snickers2029/develop

updated flightroute and flightRouteSet to support score compution
for sam
Merge pull request #34 from snickers2029/develop

for sam
evalute paths before search in sql db