* Initial Trie.cpp refactor
* Delete still needs to be tested
* RetrieveKeyByPayload still needs to be tested
* Test occasionally fails on ut_trie.cpp:163
* 87% unit test code coverage
* Still needs to be tested for memory leaks
removing random_str_list memory leak
removing death tests from hyStack
* adding TrieIterator unit test (97% coverage)
* Removing iostream from trie.cpp
Merge branch 'v3-template' of https://github.com/stevenweaver/hyphy into v3-template
Manual merge resolve