Fixes Issue #45  Adds "upTo" date to IgnoreAttribute
Changing IgnoreAttribute's UpTo constructor parameter to a named parameter per feedback from Issue #45
Merge branch 'master' into pr/69
Fix for issue #45

- Renamed UpTo to Until
- The test now runs when the Until date has expired
- Added an IgnoreUntilDate property that gets set
- The date and/or time is specified in UTC. If no time is given, it defaults to midnight UTC.
- If no reason is given, it is set to "Ignoring until yyyy-mm-dd hh:mm:ssZ"
- If a reason is given, it is not altered since that information is in the IgnoreUntilDate property.
Merge branch 'pr/69'

Conflicts:
	src/framework/Internal/PropertyNames.cs