Merge pull request #19 from fujiy/master

PR
Renamed UnsubscribeUser to RemoveSubscription
Added comments to subscription
Broke down subscription Creation by object type
Fixed bug introduced by commit 7561b0f25c71ef06b4e444ddbaad28acd696f0d7 where postparams were not being sent
Fix CreateTag
Tests couldn't be run when class set to internal
minor comment fixes
Improved commenting for exceptions
Merge pull request #21 from damiangreen/master

Real Time Subscription work
JSON.NET Update
Merge branch 'master' of https://github.com/InstaSharp/InstaSharp.git
Merge pull request #12 from InstaSharp/master

Update