Add some missing files, submodules, and detail to README on how to get running.

- Correct path to EnyoPlatform to point to Github, instead of my old F
  drive. No, you can't have access to my F drive, or any other drives of
  mine. :P
- Add submodule for Enyo 1.0.  Hopefully the version of Enyo that I was
  packaging did not have any specific mods required to work.
- Fix index-chrome to point to that submodule, as all the others already
  did, except for the legacy webOS index, which is intended to point
  to the on-device version of Enyo.  Note to future packagers: If packaging
  for a webOS or LuneOS that includes Enyo 1.0, you shouldn't need to
  include the enyo-1.0 directory in your package.
- Add missing "requiresEnyo" popup that is referenced in all the index*
  files
- Add "sdltts" which is a binary that was provided for text-to-speech
  support in legacy webOS.

Change-Id: I4c3815e5bddfab230893a3b5e0a013fe31906039