Final readover of Physical Implementation chapter
Restructure GPU chapter
Merge pull request #81 from dmpro2014/restruct-gpu

Restructure GPU chapter
Update solder test table
Move pcb testing to single file
Remove unused part
thread spawner figure
thread spawner diagram
Write draft of thread spawner chapter
new thread spawner diagram
Address GitHub comments
Merge pull request #82 from dmpro2014/physical-lookover

Final readover of Physical Implementation chapter
Update oscillator table
Update jtag test table
Update sram test status
Merge pull request #84 from dmpro2014/sram-test

Update sram test status
Update pcb testing text
Correct high freq crystal results
Merge pull request #83 from dmpro2014/pcb-test

Pcb test
Make it actually a4