Return immediately after sort when query is empty
Generate coverage reports (jscoverage required)
Check that JSCoverage tool is installed
Use istanbul instead of mocha's html-cov reporter
Adjust timeout for sort test
New coverage tool makes instrumentation on the fly
Add cursor stream
ensureIndex should return index name
Explicitly exit the program when tests are completed

otherwise application hangs when testing mongo
Select DB engine using command line options (SKI-122)

Contrib tests do not work because of several reasons:
1) db is not cleared for tingodb
2) bad async tests fail on mongodb in mocha
Fix problems with non-empty database
Fix exception when closing already closed db
Workaround for bad async tests
Fix problem with multiple instances of db
Use private instance of MongoDB for tests (SKI-122)
Pass script options to test runner
Fix cursor count method for skip and limit (SKI-123)
Set exact version of mongodb