Update stylesheet and templates

Stylesheets update includes:
- Changing pygments class to default .codehilite
- Introduction of styles for new template components
- changing to a 16 column layout ( might revert back to 12 )
- reducing column gutter
Template work includes:
- removing extra ul from site_social
- adding creative commons handling to page_footer
- creating tags to display all tags with article counts
- adding the blogroll to base in aside
- starting work on tag

static/sass/voltaicideas/pelican-red/_pygments-github.scss

@@ -1,6 +1,6 @@
 /* Pygments Code Highlight */
 
-.highlight {
+.codehilite {
     .hll { background-color: #ffffcc }
     .c { color: #999988; font-style: italic } // Comment
     .err { color: #a61717; background-color: #e3d2d2 } // Error