Clean up + rename modules + some restructure

[sectore]

• Remove all double content
• Restructuring of folders and modules to have everything inside of folder OutWatch

  .
  └── OutWatch
  ├── Attributes.purs
  ├── Core.purs
  ├── Dom
  │   ├── Builder.purs
  │   ├── DomUtils.purs
  │   ├── EmitterBuilder.purs
  │   ├── SnabbdomHelpers.purs
  │   └── VDomModifier.purs
  ├── Helpers
  │   ├── Helpers.purs
  │   ├── Promise.js
  │   └── Promise.purs
  ├── Sink.js
  ├── Sink.purs
  ├── Tags.purs
  └── Util
      ├── Http.purs
      └── Store.purs

• Rename few modules to be have more consistent modules names (e.g. OutWatch.Dom.Builder instead of Builder).
• Update README w/ instructions to run test
• Add yarn.lock

[LukaJCB]

Hey Jens, thanks a lot for creating this pull request, I really appreciate it and wanted to do something very similar very soon. Travis doesn't seem to like it yet, though, I think you might need to add npm install yarn first. :)

[sectore]

@LukaJCB Finally, all tests on travis are running now. It seems there are some issues to run PhantomJS by installing from yarn. So I have removed yarn.lock to avoid that travis is using yarn, but just npm bla bla. Anyway, this fix took me 5x more time than making the pull request - haha.

[LukaJCB]

Looks great to me, thanks again :)