displayed the price in the dynamic list

- added the price into the dynamic list inside myscript.js
- changed the format of the price in webserver.js
introduce multipage (i.e. buy and sell page)

very very simple change to now have 2 pages and nagivation between
them.  the pages are:

1) Buy (this is essentially what I used to display)
2) Sell (this is now an empty page waiting for some upload form)

see:
http://jquerymobile.com/demos/1.2.0/docs/pages/multipage-template.html