Allow passing a parameter to timer callbacks (contributed by Bill Knight <billk@rosw.com>)

Merge pull request #11 from marcelloromani/feature/simpleTimerPlus

Feature/simple timer plus

v1.0.1

Merge pull request #10 from marcelloromani/feature/issue_3_unit_tests

Feature/issue 3 unit tests

v1.0.0

add comment