Removing unused imports
Changing Trie functionality from cogent to skbio
Merge branch 'master' of git://github.com/qiime/qiime into trie
Removing pycogent_backports/usearch.py
Solving merge conflicts
Fixing @wasade's comments
Fixing merge conflicts
Merge pull request #1435 from josenavas/trie

Port the use of the Trie object from cogent to skbio