Add tests for arguments deserialization

Both JSON- and TypeConverter-encoded arguments should be deserialized
correctly to be backward-compatible.
Support argument deserialization from JSON
Serialize job arguments using Json.NET
Fix SQL Server test
Handle `null` values correctly
Parse collection items in method call renderer
Add .editorconfig file
Render parameter names correctly
Serialize/deserialize arguments using JobHelper methods
Decrease the split string threshold in dashboard
Try to decode from JSON before display an argument
Decorate enums with type name in dashboard
Display unknown types as JSON string in dashboard
Change deserialize method name in dashboard
Remove leading 'i' char from  interface based jobs
Handle null arguments in dashboard
Escape quotes in raw JSON arguments
Merge pull request #155 from HangfireIO/json-arguments

Converting job arguments using Json.NET instead of `TypeConverter`