Merge pull request #92 from splunk/release/2.2.9

Release/2.2.9

Merge pull request #82 from splunk/release/2.2.8

Release/2.2.8

Update release to 2.2.7

Update changelog and version number to 2.2.6

Release 2.2.5

Release 2.2.4

Release 2.2.3

* develop:
  Update version number to 2.2.3 and update CHANGELOG
  Update AppVeyor to include 6.3.3
  Add Appveyor CI support for the C# SDK
  Resolved DVPL-5630, DVPL-6736, and DVPL-6737
  Fixed README so that all occurrences of C# at end of line are escaped
  Fixed README so that all occurrences of C# at end of line are escaped
  Resolved GitHub issue 44 (DVPL-6735) Empty field value causes InvalidDataException: Read </value> where </text>
  Addressed DVPL-5873, C# SDK - ExportSearchResultsAsync throws an error with blank  results
  Fixed up project file
  Project file update
  Widened ServerInfo.Build to 64-bits and added the BuildNumberConverter class
  Removed two groups of obsolete TODOs
  Test update
  Expanded this issue to include Service.ExportSearchPreviews failure
  Draft fix with test for this issue: Service.ExportSearchResultsAsync does not recognize errors that occur during export
  Addressed issue, added test and verified that all known unbroken tests pass on Splunk 6.3

Release 2.2.2

Release 2.2.1

Release 2.2.0