add id='global' to nav tag in 3 HTML files

move the nav from min45.25 to min0; change nav to #global; change nav to nav#global on min60em

deal with the menu; menu looks good on firefox responsive size, but a little weird when 500<width<600

make the bg less separated
Merge pull request #2 from cicirao/xi

Squashed 4 commits, manipulate the menu layout.
Remove #global from screen.css.
Added to screen.css line #220.
Remove unnecessary id ‘global’.
Added an idea about <nav>.  Re-ordered list.
Align <nav> as before renovation.
Make <body> fill space at < 12.5em.
Redo haml/less conversion, post renovation.
Creating Lessc source for screen.css
typo in CSS
More subtle colors differences.
Merge use-pre-processors.
Note about .haml and .less
Re-order color variable-name-numbers -> higher=darker.
Merge branch 'master' of https://github.com/mfreema5/tawp
Added section explaining JIF.
Actually added it this time.
Added HTML table.  Markdown didn't render.