(typo) manipulating_tweens.html

This PR corrects a typo within `manipulating_tweens.html`. 

It changes `update` to `updated` to explain that tweens are not "update(s)" (noun) themselves but can instead be updated (verb).
(typo) removing_and_destroying.html

This PR corrects typo from `ressources` to `resources.`
(typo) update removing_and_destroying.html

To continue the last commit, also correct `ressources` present in the `meta` tag and `h2` tag.
Merge pull request #73 from francismakes/master

Thanks. :)
I just realized - disrecard is also a typo - it should be disregard. ;)