Fixed broken links via awesome-lists-bot

[giphybot]

This Pull Request has been generated automatically by awesome-lists-bot, which was created by @ColinEberhardt. The aim of this bot is to improve the overall standard of the various GitHub-based 'awesome' lists.

For questions / comments regarding the bot, or to have your awesome repo removed from the list, please add an issue here:

https://github.com/ColinEberhardt/awesome-lists-bot

Currently the bot does the following:

• Removes links that returns 404s (please double check these deletions before merging in case it is a temporary issue)

More features are on the way ...

• Add a star count for repos, this helps people find popular projects (especially useful for big lists!)
• Resolve redirects, updating the project / org name when a redirect is found.

Here's a summary of changes as part of this PR:

Awesome link checker verified 156 links, finding 3 broken

• [404] http://denbuzze.com/post/5-lessons-learned-using-gulpjs/
• [404] http://pomax.github.io/1420592591221/taking-react-to-the-next-level-mixins-gulp-and-browserify
• [404] https://github.com/murphydanger/gulp-minify-html