Update highlighted lines in tutorial

Minor issue, but I found it distracting that the highlighted lines were not accurate. I *believe* this fixes them up.
Merge pull request #648 from bricooke/patch-1

Update highlighted lines in tutorial
Improving never seen error message

Removing repeating "support it" and fixing camelCase method name
match -> test

Using RegExp method `test` because this is what is wanted
Use rest parameters whenever it makes sense.
Add loop property
Fix Merging `propTypes`, `contextTypes`, and `childContextTypes`

This fixes merging of `propTypes`, `contextTypes`, and `childContextTypes` so that we actually merge (instead of only taking the component or last mixin).
Fix SelectEventPlugin

mouseup was not fired when context menu showed, so select events stopped being fired.
Merge pull request #637 from cpojer/use-rest-params

Use Rest Parameters where it makes sense
URL -> url
Merge pull request #653 from fabiomcosta/patch-3

match -> test
Merge pull request #651 from fabiomcosta/patch-2

Improving never seen error message