Renamed ut_hySite.cpp to ut_Site.cpp.
Merge pull request #199 from mdsmith/v3-template

Renamed ut_hySite.cpp to ut_Site.cpp. Thanks Martin.
Merge branch 'v3-template' of https://github.com/veg/hyphy into v3-template
* Initial Trie.cpp refactor
* Delete still needs to be tested
* RetrieveKeyByPayload still needs to be tested
* Test occasionally fails on ut_trie.cpp:163