Enable JS scripts in styleboard examples
Add angular support
Angular support through ngApp config option.  This allows us
to update the body of the iframe without reloading all scripts
and then call angular.bootstrap on it.
Fix src=undefined when no scripts are specified
Move config file inside styleboard folder.

This way the paths are consistent/relative to
both the config file and the index.html file.
Fix back button to return to index

Bug: Was showing pattern "false"