typo's ch07

r225: Thunderbolt kabel --> Thunderbolt-kable
r208: MAC --> Apple (of Macintosh)
r216: PCIe 4x poort --> PCIe 4x-poort
r228: PCIx poort --> PCIx-poort
r8: Centronics poort --> Centronics-poort
r11: COM poort --> COM-poort
Merge pull request #33 from Haroenv/patch-2

typo's ch07