Re-Add the SOAP jira API with option to use over REST.

It has limited function, so rest is preferred
Do not show remaining as 0 when no time tracking data.
Attempt to fix change log & only show correct versions.
Correct syntax in change log XML
Add Pre release as name of latest version
Add Atlassian.Net SDK to README.md
Fix Issue with subtracting time before a timer has been stopped.
Added Uninstaller to handle a URL change.
Update to release stable 2.1.0
Correct readme
Merge branch 'develop'