add default tick function to constructor arguments
update code style
Merge pull request #10 from maxogden/func-arg

add default tick function to constructor arguments
fix one more thing
0.1.0
Updating tape
Merge pull request #11 from ljharb/update_tape_again

Updating tape
0.1.1
moved polyfill into own file
Merge pull request #14 from Raynos/master

moved polyfill into own file
0.1.2
Fix "Illegal invocation” issue when in node-webkit

Native functions must be executed in the context of window.
Merge pull request #15 from Sdonai/master

Fix "Illegal invocation” issue when in node-webkit
0.1.3