BugFix for change in jade API

It seems that Jade has changed it's API. 
When I create the default spine skeleton app with spine.app, and run it with "hem server". I get the following error:

hem server
Starting Server at :9294
Error: The `client` option is deprecated, use `jade.compileClient`
    at Function.res.toString (/usr/local/lib/node_modules/hem/node_modules/jade/lib/jade.js:164:17)
    at Object.compilers.jade (/usr/local/lib/node_modules/hem/lib/compilers.js:107:27)
    at Module.compile (/usr/local/lib/node_modules/hem/lib/stitch.js:86:33)
    at Object.<anonymous> (/usr/local/lib/node_modules/hem/assets/stitch.eco:76:105)

The little change above, fixes this.   Please test this bugfix thoroughly. I am quite new to coffeescript and spine.