Changed example file so that it helps us test TOC better.
The first chapter now starts at page 9, and there are 12 sections.
Used a modified version of the tocstyle package.
Fixes #9 and fixes #18
Instead of using a customized tocstyle, just overwrite the troublesome command that was preventing custom definitions of \l@section etc..
Uses original tocstyle instead of the modified one
Fixes #19
Cleaner usage of the tocstyle package