Wip/add options app json

[someoneAnyone]

Second try!
Added the following to App.json:

  ,"CUSTOM_TITLE": {
      "description": "Customize the name of the website, usually the name of T1.",
      "value": "",
      "required": false
  },
  "THEME": {
      "description": "Possible values default or colors",
      "value": "",
      "required": false
  },
  "SHOW_RAWBG": {
      "description": "Possible values always, never or noise",
      "value": "",
      "required": false
  }

Issue #748

[codecov-io]

Current coverage is 83.93%

Merging #749 into dev will not affect coverage as of 04a90c6

@@              dev    #749   diff @@
=====================================
  Files          46      46       
  Stmts        2420    2420       
  Branches      486     486       
  Methods       366     366       
=====================================
  Hit          2031    2031       
  Partial        17      17       
  Missed        372     372       

Review entire Coverage Diff

---

Uncovered Suggestions

1. +0.57% via lib/mqtt.js#128...141
2. +0.49% via lib/utils.js#31...42
3. +0.49% via lib/mqtt.js#292...303
4. See 7 more...

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[jasoncalabrese]

Looks like lots of indent changes, project default is 2 spaces

[jasoncalabrese]

Pulled commits with #751