feat(ts): Initial typescript version of guide.

[laskoviymishka]

Add specific folder and initial en-US version of a document. After initial doc merging adding i18n folder to it would be much easier.

Closes #69

[toddmotto]

Hey @laskoviymishka ! So, we made a few edits to the current styleguide. Essentially dropping *.controller.js and adding it as an ES6 class on the controller: props, would you be able to grab the latest changes please and jig things around to fit? :) would love to merge this!

[laskoviymishka]

@toddmotto sure, I love this part. But would you mind if I recommend to use some decorators for this instead of old way? Inside regular guide there will be code pretty much same as es6 version, but in TS there is a lot of awesomeness that comes from decorators world (like this one https://github.com/MikeRyan52/angular-decorators or https://github.com/ngUpgraders/ng-forward or https://github.com/ngParty/ng-metadata). I could suggest to use them if you don't mind.

[toddmotto]

For the guide, as "vanilla Angular" as possible, however we can add a better "Potential recommendations" I think, citing something like ngMetadata and ngForward etc. :)

[laskoviymishka]

@toddmotto well vanilla angular totally make sense. Let skip this part to later one :)

[toddmotto]

Hey, sorry for the delay with checking this - is it reviewable now? :)

[laskoviymishka]

yep

[toddmotto]

This is amazing - thank you so much! :)