Hangfire 1.3.1

https://github.com/HangfireIO/Hangfire/releases 1.3.1 * Fixed – Worker stops processing on storage exceptions. 1.3.0 * Added – Generation of NuGet symbol packages with `*.pdb` and source files. * Added – Allow to customize serialization settings of Json.NET (by @fpellet). * Added – Ability to configure `ServerTimeout` option. * Breaking – Use `LibLog` package instead of `Common.Logging` for logging. * Changed – `Hangfire.SqlServer` is now merged with `Dapper` package. * Changed – `Dapper` package updated to 1.38. * Changed – Use ILMerge instead of ILRepack (found there is a NuGet package for it). * Changed – Update `Microsoft.Owin.Host.SystemWeb` to the latest version. * Fixed – Dashboard not crash if a scheduling task is cancelled (@fpellet). * Other – Use psake instead of MSBuild for project build automation.