PathwayWikiSearch needs updating for 2.2

[egonw]

TypeError: Cannot read property '_about' of undefined
    at PathwaySearch.parseInformationResponse (/home/egonw/var/Projects/GitHub/ops.js/src/PathwaySearch.js:596:39)
    at Request.callback (/home/egonw/var/Projects/GitHub/ops.js/test/spec/integration/PathwayIntegrationSpec.js:22:34)
    at Request._callback (/home/egonw/var/Projects/GitHub/ops.js/src/PathwaySearch.js:37:22)
    at Request.self.callback (/home/egonw/var/Projects/GitHub/ops.js/node_modules/request/request.js:187:22)
    at emitTwo (events.js:87:13)
    at Request.emit (events.js:172:7)
    at Request.<anonymous> (/home/egonw/var/Projects/GitHub/ops.js/node_modules/request/request.js:1048:10)
    at emitOne (events.js:77:13)
    at Request.emit (events.js:169:7)
    at IncomingMessage.<anonymous> (/home/egonw/var/Projects/GitHub/ops.js/node_modules/request/request.js:969:12)