mom's email list of changes, tweaks

- text changes on visits
- added upcoming visit box on other presentations
- separate forthcoming page
- drop down menu under books
- spacing at top and bottom of site
- welcome on home page
- removed "out of print" box, added text next to buy button
- changed colors of links purple, book awards text blue, books nav to
yellow
- added pics to visits, other presentations
- fixed covers on PDF promo
- misc tweaks