rust

Revise and reorganize "Why the Component Model?" section #60

Job	Run time
build (component-model/examples/tutorial/calculator, component)	26s
build (component-model/examples/example-host)	1m 56s
build (component-model/examples/tutorial/command, component)	20s
build (component-model/examples/tutorial/adder, component)	53s
	3m 35s

Provide feedback