Start or Stop workflow using JSOM

http://sharepoint.stackexchange.com/questions/174755/how-to-stop-a-sharepoint-workflow-using-jsom

http://sharepoint.stackexchange.com/questions/110937/kick-off-sharepoint-2013-workflow-using-jsom-in-app

http://sharepoint.stackexchange.com/questions/109166/error-starting-a-workflow-on-host-web-from-within-a-sharepoint-hosted-app/110970#110970

http://sharepoint.stackexchange.com/questions/159432/programmatically-create-workflow-with-javascript-jsom-and-sp-workflowservices-w

http://www.vrdmn.com/2014/08/start-sharepoint-2013-workflows-with.html

http://www.codeproject.com/Articles/607127/Using-SharePoint-Workflow-Services-JS-API