Added gulp beautify and removed gulp prettify

[gokunymbus]

removed prettify because it was causing issues for people behind proxies. Should fix #112

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[ericthompson]

Built great for me - we'll need to be sure to tell folks to npm install again to bring down gulp-html-beautify in the release notes for the next version.

Approved!

[mikewheaton]

Approved

[kenhansen01]

Running the following commands solved my proxy issues:

git config --global url."https://github.com/".insteadOf [email protected]:
git config --global url."https://".insteadOf git://

This tells git to prefer https rather than git locations