flight.js: fix NAN speed
Make skylines.tests.lib a package
test infrastructure: method for cheap db cleaning introduced

Clean up database before each test to make individual
tests really independent.
test infrastructure: create file upload directory for tests
Use system /tmp to test uploads
Do not ignore 'data' directory

If some data dir has to be ignored, please include full path to it
Simple functional test for file uploading
Make sample data directory available to all tests
model/follower: Added NOT NULL constraint to user id columns
model/follower: Added unique constraint to user id columns
lib.xcsoar.analysis: Added run_analyse_flight() function
test_upload: Use assert_in for containment tests
test_upload: Mock run_analyse_flight() function during upload
test_upload: Mock flight_path() function during upload too
Merge pull request #83 from Turbo87/kedder

File upload unit testing
Merge pull request #84 from Turbo87/followers

Added database constraints for followers table