bring in nodeunit for tests
starting Job tests
few more tests
test exposing issue with jobs scheduled in the past
basic tests for recurrence rule based scheduling
tests for #cancel
some tests for .scheduleJob
some tests for .cancelJob and reworded a few tests
some tests for RecurrenceRule#nextInvocationDate
few more recur rule tests
range tests
tests for .fromCronString
bit nicer alignment
Export list of scheduled jobs mattpat/node-schedule#16
Merge pull request #19 from psalaets/tests

Adding some tests
Merge pull request #20 from PierrickP/master

Export list of scheduled jobs mattpat/node-schedule#16