Change a sentence in the FPGA subsection
Delete a sentence about power from input section
Make alternative HDMI introduction
Move physical overview to pcb section
Write pcb testing outline

At this point this includes JTAG test,
solder test, signal and power test
Exchange "weaker version" with "less powerful..."
Change wording in oscillator test

Specifically:
From "entailed" to "consist of"
Correct typo
Change wording in JTAG test
hange the HDMI introductory wording
Delete last line in Output

It seemed a bit superfluous
Rewrite some sentences
Merge pull request #14 from dmpro2014/pcb-section-rework

Pcb section rework