Add support for tags

[wrathagom]

Any chance you'd consider adding support for Tags as a front matter and displaying a tag cloud on the feed page or homepage?

[hfactor]

Basic Jekyll tags are created and added to my personal blog .

Current features are :

1. Supports front-matter tag, tags
2. Tag is shown right under the title on every note
3. When you click on the tag, it takes you to a single tags page, which lists all notes with `feed: show'.

Autogenerating page-per-tag is complex, and I am still confused if this is the best solution to offer. Give me one more week, and I will decide and will update the upstream.

[hfactor]

@wrathagom : Another method of showing tags in Jekyll is by manually creating each tag as a page as a collection, and logically assigning them as tag-pages. Siteleaf does that. The approach is okay, but for someone with too many tags / ever-changing tags, I am not sure if this is the right way. Let me know your opinion.

[gnuanu]

To be honest, tags are noisy. It won't take long to get things bit messy. I'd prefer index pages with backlinks. It's minimal and elegant and my goto approach.