Bug 423835 - Wrong declaration marked in occurrences 

Change-Id: Ib24517bc8fec6011e9062e28ee22d1ba90367371
Signed-off-by: Mike Rennie <Michael_Rennie@ca.ibm.com>
[Bug 424758] orion.edit.outliner service does not support multiple CSS classes
[Bug 420721] validation of JSON files
Add 'npm test' script for running eslint tests
move language keywords out to separate files, move JS and JSON styling plug-ins to the Javascript plug-in file
Bug 424866 - Readonly file browser widget.-- initial commit