Adding parsing for 'notes: ' columns to validator
Add model objects for trait notes

CategoricalTraitNote and ContinuousTraitNote
both belong to otu and their respective traits - not their values
Applied migration for notes
Handle import of trait notes
Include notes in search results if present
Refactor notes text extraction into a method in otu model
Simple printing of trait notes on results
fix Typo in categorical_trait_value formatted_value
Rename headers to columns to avoid conflict with http headers
Include notes columns if notes are attached to otu/trait value pair
Render notes as a notes column if in results
Merge pull request #39 from NESCent/notes_column

Allow Notes fields for each trait