Update Issue.cs

The proposed changes fix an issue if there are spaces in the key value.  Also, it allows the users to see all the keys.  The TrySetMember probably needs to be tweaked a little more to incorporate if someone tries to save the data and there are potential multiple items.  I could not get the system to access the object like an array but the PropertyByIndex_ works.
Update Issue.cs

I made an update to the trygetindex and the trysetindex.  This was done because I noticed that the presets from the issuemanagement class are not always set.  This made it easier for me to set them after the fact.
Update IssueManagement.cs

I noticed the presets are not always set in the Issue so I added code that will add them.
Merge pull request #21 from tikicoder/patch-1

Update Issue.cs