ticket #234, made InfoBox work with marker directive

made InfoBox work with marker directive
fixed WindowChildModelSpec

reverted gruntFile to istanbul

![screen shot 2014-01-30 at 11 01 45 pm](https://f.cloud.github.com/assets/583593/2047792/746ee046-8a2c-11e3-8b82-a8ebdc375429.png)
![screen shot 2014-01-30 at 9 59 28 pm](https://f.cloud.github.com/assets/583593/2047793/7603183c-8a2c-11e3-9f73-8fc80b894bde.png)