Update various docs and comments #459

Job	Run time
target-avr-example_led (chapter02_02)	16s
target-avr-example_led (chapter02_06)	45s
target-avr-examples (chapter02_03)	19s
target-avr-examples (chapter02_03a)	21s
target-avr-examples (chapter03_02)	21s
target-bcm2835_raspi_b-example10_09 (chapter10_09)	47s
target-avr-examples (chapter04_04)	30s
target-msvc-example16_08 (chapter16_08)	2m 54s
target-avr-examples (chapter04_04a)	21s
target-avr-examples (chapter06_01)	16s
target-msvc-examples (chapter02_03)	48s
target-avr-examples (chapter06_14)	16s
target-msvc-examples (chapter02_03a)	42s
target-avr-examples (chapter09_07)	21s
target-msvc-examples (chapter03_02)	1m 15s
target-avr-examples (chapter09_08)	37s
target-msvc-examples (chapter04_04)	1m 8s
target-avr-examples (chapter09_08a)	29s
target-msvc-examples (chapter04_04a)	52s
target-avr-examples (chapter10_08)	30s
target-msvc-examples (chapter06_01)	40s
target-avr-examples (chapter10_08a)	19s
target-msvc-examples (chapter06_14)	1m 36s
target-avr-examples (chapter11_07)	16s
target-avr-examples (chapter12_04)	16s
target-msvc-examples (chapter09_07)	39s
target-avr-examples (chapter16_08)	18s
target-msvc-examples (chapter09_08)	43s
target-avr-examples (chapter17_03)	33s
target-msvc-examples (chapter09_08a)	40s
target-avr-examples (chapter17_03a)	17s
target-msvc-examples (chapter10_08)	42s
target-msvc-examples (chapter10_08a)	1m 28s
target-msvc-examples (chapter10_09)	48s
target-msvc-examples (chapter11_07)	44s
target-msvc-examples (chapter12_04)	1m 27s
target-msvc-examples (chapter17_03)	1m 28s
target-msvc-examples (chapter17_03a)	40s
	27m 22s

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