Development & build process fix and various other amendments (2nd attempt)

This changes the overall structure of the project, hence the difficult to de-construct diff. I've been pushing to my own gh-pages to test, you can view it here - http://swirlycheetah.github.io/hood.ie/ (some links won't work due to the url structure difference but you can still get to them manually).

Although this is a merge with the gh-pages branch it'll in effect need to be merged/copied over to master and then the gh-pages branch removed as that'll just be used for the deploy process.

I rebased as per @gr2m's request but it seems to have duplicated my commits, not quite sure if that's expected behaviour or my incompetence =\ If that can be tidied up I'll happily do it.

A list of amendments:

- [x] deploy with grunt-gh-pages (#43)
- [x] remove various un-required files
- [x] amend intro page installation instructions (#46)
- [x] replace Gregor's image (#33)
- [x] added a coming soon merchandise section (#48)
- [x] update readme with build/deploy process
- [x] add subtitle to title tag
- [x] remove .html from links

Other things which could be worth doing:

- [ ] serve static files from CDN (can be done for free with Cloudflare)
- [ ] concat vendor css & js in with hoodie files, e.g. jQuery & Mailchimp
- [ ] E2E testing with http://nightwatchjs.org/