Merge pull request #1 from tgroshon/master

Fixed Typo in readme.md!  Now that's a contribution
fied a small bug
merged
fixed parts of the tutorial
fixed parts of the tutorial
more work on tutorial
tutorial changes again
small change to tutorial
small change to tutorial
small change to tutorial
Signal system added.
Signal system added 2.
minor changes to signals
changed the way non-default functions work
changed the way non-default functions work
small fix
small fix 2
small fix 2