dev/model/parts: Add more parts

[DrJosh9000]

More ideas:

• Broadcast
• Function (out <- f(<-in))
• Map (out <- m[<-in]) - statically defined map? Ability to load from a file?
• Static input

More specific parts:

• HTTP server
• File input
• File output
• Database I/O

[DrJosh9000]

More idea: FIFO and LIFO queues with limited buffer size and different strategies when full.