Sidebars - updated articles and scripts

I merged master into this branch and ran a modified version of the script (included) for windows GitBash/Cygwin.

I found some leftover uses of *tip.png and tip-pen-paper.png, and I updated those to use the new sidebar syntax too.

I've tested importing them into local server and taking a quick scan into several articles in each KB display. The new sidebars show. As far as I can tell, everything looks good.

@jrao