Removed try/catch requirement

* The try/catch block was causing an exception when the named segue did
not exist in the storyboard
* The custom segue did not have a custom class define which is not
allowed
* revised the implementation to instantiate the view controller by
identifier without segues
* updated docs and added a new example of a storyboard
Merge pull request #1 from brennanMKE/remove-exception-logic

Removed try/catch requirement