Correct two displayName undefined error for object "oae.data.me.profile"

displayName undefined for oae.data.me.profile. 
Change from oae.data.me.profile.displayName to oae.data.me.displayName at two places: 

1. node_modules/oae-core/topnavigation/topnavigation.html
2. ui/me.html

![Screenshot from 2013-02-24 23:29:12](https://f.cloud.github.com/assets/1701213/190669/4b55195a-7f06-11e2-9996-822091b05a27.png)