HangFire 0.7.3

https://github.com/odinserj/HangFire/releases 0.7.1 * HangFire.Autofac package. * HangFire.Ninject package. * Added some Sphinx-based docs. * New project site and docs site. * Some minor fixes. 0.7 * Changed NuGet package structure. See the Upgrading Guide on GitHub! * Job storage abstraction. * SQL Server job storage implementation. * Using Common.Logging for logging and Json.NET for json encoding. * Short exception stack traces, they contain only your code. * Improved job fetching implementation. * Removed obsolete `Perform` class. * Increased default worker number. * Clarified some type names, state subsystem was greatly simplified. * Fixed: empty MVC 5 project Internal Server Error. * Fixed: Apply the Failed state when state filters/handlers cause an exception. * Fixed: Some history statistic counters do not expire. * Fixed: Use `StatisticsHistoryFilter` by default. * Fixed some internal mistakes. 0.6.2 * This release contains new client API, based on expressions. Please, see https://github.com/odinserj/HangFire/releases/tag/v0.6 for details. * Fixed NullReferenceException when trying to create a job using the Old API. * Fixes some NuGet package issues.