Refs #85. Assume string type
Refs #85. Use getiterator
Refs #85. Started adding test cases on utility functions
Refs #85. Added a test case on find_first
Refs #85. Show that the first element is returned
Refs #85. Show that duplicate elements are returned
Refs #85. Added test case for find_all
Refs #85. Added test case for remove_namespaces
Refs #85. Assert that the result is bytes
Refs #85. Show that passing in junk causes an exception