Adding new commands (new site [path], new theme [name])
Add client-side syntax highlighting example
Adding more information about client side highlighting
Fixing broken link. Fixed #278.
 Change some typography in the docs.

Two issues are addressed with this commit:

1. Some <pre> tags were inheriting the "Serif" font on Linux, causing
"code"-ish stuff to appear with proportional-width font instead of
monospaced-width font.
2. Font stack with "Helvetica Neue" ... has been changed to default to
sans-serif instead of "Serif", this produces a more consistent and
friendlier look on Windows in particular.
Doc fix: replace "hugolibs" with "hugo" in "contributing" page, fixes #271.
Add template comparison functions (Go 1.1 compat)
Add base Sitemap support
Add Sitemaps config values handling
Update Sitemap default value syntax
Add Sitemap testing
Add Sitemap documentation content
Add pygmentsstyle and pygmentsuseclasses options

Fixes #204

Conflicts:
	commands/hugo.go
Correctly print server URL when base-url is specified in the command line

When running hugo server like:

    $ hugo server -s docs -b myhostname

the printed output now directs to http://myhostname:1313 instead of
(invariably) http://localhost:1313.

As per server(), BaseUrl is never empty, and the required value is always
found in Viper.
Fix date issue with home page in Sitemap
Make template comparison functions handle floats
Add a blank line after the front matter when writing back a page.

Could also be done in parser.InterfaceToFrontMatter(), but logically the
extra blank line belongs to the page, not the front matter itself.
Fix permalink functionality, which was broken in 62dd1d4.

Viper stores Permalinks as a map[string]interface{}, so the type assertion
to PermalinkOverrides (map[string]PathPattern) will always fail.

We can, however, get Permalinks as a map[string]string, and convert each
value to a PathPattern.
Merge remote-tracking branch 'upstream/master'
Homepage renders with _default/list.html or then _default/single.html when index.html is not present.