Created model and DI for hpi_fields table
Added model and DI for treatment_fields table
Added model and DI for patient_encounter_hpi_fields table
forgot generic repo from last commit
Added model and DI for patient_encounter_treatment_fields table
organized DI data layer module
Added date_taken to patient_encounter_treatment_fields
add not null to columns in patient_encounter_hpi_fields
Merge pull request #83 from kevinzurek/feature-DataModels

Feature data models