Added basic styling and relevant gulp tasks

[michealbenedict]

This is with regards to #38 and #40. The PR contains a set gulp tasks to consume a basic template (jade and scss -- not sure whether this choice makes sense, but I'd like to hear otherwise) and wrap it over the markdown files to generates a valid site with TOC (check attached screenshot).

• Added generate:site which generates HTML site by passing markdowns through a template
• Added basic jade template and sass styles
  • Refer index.jade
• Added gulp-layoutize plugin which wraps the content with a template
  • Supports other templating engines since under the hood it uses consolidate.js
• Added dev gulp tasks such as watch and serve (with livereload).

Feedback appreciated, thanks!

[addyosmani]

@sindresorhus how does this look to you in it's current form with the updated commits?

[sindresorhus]

lgtm. nice work @rowoot. it turned out really well :)

[michealbenedict]

Thanks @sindresorhus and @addyosmani.

To @sindresorhus concern of having the gulp-parse-toc in the current repo, I look forward to figuring out a better solution to move it out and add testing to it.