fixing of the backtracking algorithm
numerous bug fixing
Code cleaning corrections more test cases
Removed GAE dependency, support localDB only, merged client UI with layout modifications
minor changes
Merge pull request #2 from ar8ahmed/localdb

Client UI merge with master
fixing the infomred exception
adding some error messages
more test cases
all test cases new database dump task info in the screen
Client UI fixes
Merge pull request #3 from ar8ahmed/localdb

Client UI fixes
reduced test cases, better expected disatnace error calculation
constants file updated
Merged from master, and prepared for GAE deploy