Add missing periods

Existing Wording:

The following data-elements are mandatory (i.e data MUST be present) or must be supported if the data is present in the sending system (Must Support definition).

Each MessageDefinition must have:
1. A canonical url
2. A status
3. A date
4. An EventCoding
5. A category of “notification”
6. An event focus reference
7. A GraphDefinition to define the Bundle contents

Each MessageDefinition must support:
1. A version
2. A name
3. A title
4. A publisher
5. A description

Proposed Wording:

The following data-elements are mandatory (i.e\. data MUST be present) or must be supported if the data is present in the sending system (Must Support definition)\.

Each MessageDefinition must have:
1\. A canonical url\.
2\. A status\.
3\. A date\.
4\. An EventCoding\.
5\. A category of “notification”\.
6\. An event focus reference\.
7\. A GraphDefinition to define the Bundle contents\.

Each MessageDefinition must support:
1\. A version\.
2\. A name\.
3\. A title\.
4\. A publisher\.
5\. A description\.