Clone repository recursively, submodule'ed themes

Git submodules are great to keep track of themes without having to manage them all in one repository.

But cloning the main repository only gets you empty folders for the submodules; an additional init is needed.

It's easier and more convenient to just clone the main repository recursively, in order to pull in all themes.
Fix misc styling bugs.

- Change header and site name colors
- Fix heading sizes for pages and archives
- Change navigation link color
- Fix syntax highlighting. Now using solarized theme
- Fix HTML lists using list-style-position
- Increased spacing between posts
- Update foundation CSS, JS files
Update screenshot.
Update pygments.css to use dark solarized color scheme.
Fix scrolling with syntax highlighting.
Fix syntax highlighting.
Undo white-space nowrap for pre tags.
Fix pre tag white-space behaviour.
Merge pull request #94 from daniel-j-h/patch-1

Clone repository recursively, submodule'ed themes
Merge pull request #99 from Mins/master

Updates to tuxlite_zf theme.
Use hanging indents for lists. Pad articles to preserve viewing area.
Fix html tag order and change color for article title.
Update screenshot.
Merge pull request #101 from Mins/master

Further updates to tuxlite_zf theme.
Added new theme irfan
Merge pull request #103 from erfaan/irfan-theme

Added new theme irfan
Add new theme: Gum
add svbhack responsive theme

svbhack is a svbtle inspired responsive theme for pelican, it does
not want to be a close copy but rather a svbtle-like theme; CSS is
rewritten completely, it also uses LESS and is rather lighweight
Merge pull request #106 from giulivo/svbhack

add svbhack responsive theme