Working on the subsets/create methods, wrote a useful helper
Fixed set polymorphism error
Added delete method to Base
Added universal method to get items from Sets
Reorganized subsets views for now, started work on read.py
Added a surface column to WordInSentence
Working on implementing create and read in subsets
Removed import * from code
Wrote get_highlight_text
Merge pull request #30 from Wordseer/better-imports

Better imports
Merged, still need to resolve sets.py conflict
Fixed conflicts in sets.py with all tests passing