Add URLs to the What's new page

- Add link for the Imspector format
- Add link to the OME model documentation
Add .fake extension to the SPW root folder
specification: Use correct unit and matrix symbols
Use local rather than external links as per Melissa's suggestion
Merge pull request #570 from sbesson/whatsnew_urls

Add URLs to the What's new page
Update autogenerated metadata pages for 2013-06

Noticed by @sbesson.
Update OME-XML and OME-TIFF pages to include 2013-06 support
merge develop -D org -I include -E exclude: PR 528 (Tile performance improvements for VMS and NDPI)
merge develop -D org -I include -E exclude: PR 556 (Add ``mkfake`` tool)
merge develop -D org -I include -E exclude: PR 569 (Web script for Schema 2013-06 release)
merge develop -D org -I include -E exclude: PR 571 (specification: Use correct unit and matrix symbols)
merge develop -D org -I include -E exclude: PR 572 (2013-06 schema links)