Update README.md

Fix typos
Add client_updated_at and account_number
Add notes about array/object options
Add curl test examples
Return a match response if update happened successfully
Handle non-matches differently in preparation for AddOrUpdate
Add endpoint and service for Add/Update
Add note
Merge pull request #6 from CruGlobal/data_mapping

Data mapping
Add javadoc
Merge pull request #7 from CruGlobal/add-or-update

Add or update
Add endpoint for Add/Update
Remove unused imports
Merge branch 'master' of https://github.com/CruGlobal/opendq_api_facade
Modify the code lookup to make sure only phones are paired with phones, and only emails are paired with emails
Change property name to make room for realtime properties as well
Clear some notes now that I have some answers to these questions
For now, just choose a cod_id
Add source object
Turn linked identities into a list to handle possible multiple values passed in.  Also, siebel contact id is just one possible client_integration_id
Update schema for authentication
Reduce duplication