Update Medication code from 10160-6 to 10160-0

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Add doseQuantity center support

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Refactor e2e medication extract_dates to use superclass version

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Update E2E Allergies & Medications DoseQuantity
Minor code reduction cleanup

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Change entry_xpath to use relative section id and code
Update Conditions and Immunizations sections

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Update Vital Signs & Results importer

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Add E2E Encounters support
Update entry xpaths to be more concise to E2E

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Add E2E Encounters Unit Test
Clean up E2E test indentation

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Fix NKA handling on E2E Allergy importer

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Add Provider Todo notes

Signed-off-by: Jeremy Ho <jujaga@gmail.com>
Add encounter performer information
Embed performer into encounter model
Added some hard-coded codes to encounter section so patientapi will pick it up
Test included encounter codes
Modifications for current state of Oscar E2E export documents as of June 3, 2014
Latest version of E2E document.
Use DateTime rather than Date for provider date/time
Anonymize provider info
Merge branch 'scoop-e2e-1.35' into scoop-develop