Update all examples to work with encrypted CHID
Better comment for patient_id.

We have two ids here so it's better to point which we're talking
about.
Uncomment examples in index.html.
Use session headers in all JS examples.
Merge branch 'encryption-update' of github.com:cambridge-healthcare/api-samples into encryption-update

Conflicts:
	js/delete_patients_id_medication_id.js
	js/post_patients_id_medications.js
	js/post_users_authenticate.js
	ruby/delete_patients_id_medication_id.rb
	ruby/get_users_id.rb
	ruby/post_patients_id_medications.rb
	ruby/post_users_authenticate.rb
Update session keys in Ruby examples to be the same as in JS.
Merge branch 'encryption-update' of github.com:cambridge-healthcare/api-samples into encryption-update
Update get_blood_glucose.rb keys.
JavaScript version of Blood Glucose example.