NPM v2.0.6-beta

This release's major aim is to support React Native with the following update:

• include a custom version of SignalR JS client based on v.2.2.2 that has no hard dependencies to jQuery and window variable.
• remove hard dependencies to full jQuery, window variable and React DOM from dotNetify core module; no more need to include jQuery plugin in the webpack configuration.
• include jQuery shim that has dependency only to jQuery-deferred npm library.
• add new API dotnetify.connectionStateHandler to provide connection state changed events.
• add new API dotnetify.hubServerUrl to specify server URL.

Other misc. updates:

• decouple signalR hub code to a separate module to lay the groundwork for supporting the new version of SignalR client for .NET Core.
• include Typescript definition files ( issue #46 ).