Changed cs into contentSwapper for clearer layout
Added unit tests for contentSwapper
Fixed dependencies on meta info
Added tests and actually found an error in ContentSwapper thanks to them.

You can now run yogi serve --istanbul in the /src folder and you
can see the tests and coverage for zeView and contentSwapper.

ContentSwapper, being so small, gets an almost 100% coverage.
ZeView is still in the yellow/redish region in coverage.
Merge pull request #1 from Satyam/master

Added unit tests to zeView and ContentSwapper