New applications added for IOT2050-SM

[BaochengSu]

This is the last part of the IOT2050-SM series, targeting new added applications, including:

• EIO manager, which is a service set to manage the extended IO subsystems
• Conf webui, which is a web frontend for configuring the extended IO subsystem.
• Event Record, introduces some IOT2050 related events.

[jan-kiszka]

Why all theses removal patches in this series? Why not simply starting small and only adding the incomplete things in a later series?

[BaochengSu]

Refined the story line for an easier reviewing.