added in the sidebar and a temp html which hides it

- saved the sidebar graphic assets from the main psd
- sliced and exported sidebar menu buttons
- added the sidebar to index.html demos closed and open menus
- created index-nosidebar.html to demo the sidebar being hidden and the content area getting 100% width
- made the nav information text responsive by lowering font size when under 800px

Signed-off-by: Mark Lamont <mark@prodesignscotland.com>
reverted change of nav info text width

previously changed down to 50% but at screen sizes over 800px this wasn't enough to contain it so it was increased back to 60%

Signed-off-by: Mark Lamont <mark@prodesignscotland.com>
added page navigation buttons and added hover states

created graphics from the main psd asset and sliced that into next and previous buttons, also added hover states using opacity for the show/hide sidebar button, and the actual sidebar menu options as well

Signed-off-by: Mark Lamont <mark@prodesignscotland.com>