improving docs
Corrected spelling errors in can.Control docs.

* Fixes bitovi/canjs.com#136
* Fixes bitovi/canjs.com#134
* Fixes bitovi/canjs.com#133
* Fixes bitovi/canjs.com#131
Merge pull request #456 from neektza/master

Corrected spelling errors in can.Control docs.
pointing to the new logo location
fixes the docs for https://github.com/bitovi/canjs.com/issues/132
adds .extend a few places
Clarify the use for escaped ejs tag.
Fixing typos
how to contribute changes
Merge branch 'master' of github.com:bitovi/canjs