Removed dispose event of the HttpApplication to prevent too many new providers being created. Fixed some methods that required the ActiveProvider to not be null.
Removed dispose event of the HttpApplication to prevent too many new providers being created. Fixed some methods that required the ActiveProvider to not be null.

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS06]$/51degrees;C76844

axle-h/.NET-Device-Detection