Added path in url.

Page#dir was returning the wrong dir ('/') for pages in directories.
Look for plugins under the source directory

When generating the site, Jekyll will now look for plugins under the
source directory by default. The plugin location can still be changed in
_config.yml
Merge remote-tracking branch 'upstream/master' into issue-653
Look for plugins under the source directory by default
Add TomDoc
Merge branch 'master' into issue-653
first pass at --drafts flag
fix tests
add drafts.feature
Scaffold site, based on @mojombo's site (with permission).
Added the NewCommand class
Added the site_template files to the gemspec manifest.
Added command to primary binary.
Using modularized commands (Jekyll::Commands) as per @tombell's latest PR merge
removed related posts segment of scaffold site.
Added newline to New command for stylistic congruence.
Move post scaffold content to a separate method.
Added very basic code snippet example to sample post
Improve error message for malformed highlight tags
Using .erb file for the new post