small adjustments | added _clone helper function

_clone is good for data copy - serializes/deserializes using json
moved state objects to state folder
renamed state objects
refactored state code -> specifically snapshots.state.js
removed images | added chess examples
updated executeCode |fixed _getCode using shareJS method
updated the tmpl.js | updated chess example
saves customization to DB | updated chess examples
added highlighting editor rows
fixed highlighting editor rows
sundry
updated docs

README-project-requirements.txt -> README-runtime.txt

README-project-setup.txt -> README-setup.txt
updated build files | updated docs