Exposing the cookies flushstore method
Add files to project (easier to do manually than fix merge issues)
Rename IComplete to ICompletionHandler to make naming more consistent
return response from FlushStore method
Change codepage to fix copyright symbol encoding
Add license disclaimer
Simplify code flow (I think it's preferable to check == rather than != when both conditions are evaluated)
Merge pull request #399 from amaitland/feature/flush-cookie

Expose Flush Cookie API based on #313