Clean up hardware section
Merge pull request #93 from flakeshake/master

Add camera hardware documentation, close #55
Reverse numbers for HDMI and analog output

On my new raspberry pi model B, the output numbers are the opposite from the docs.
Merge pull request #94 from thomasvs/master

Reverse numbers for HDMI and analog output
Update licence info
Fixed missing root / for etc/wpa_supplicant/wpa_supplicant.conf
Merge pull request #96 from tomcrick/master

Fix missing root / for path to wpa_supplicant.conf
Update camera.md

Links not working; contain extra '/blob'
Merge pull request #97 from DirkUK/master

Fix broken links
Update camera.md

Corrected links
Merge pull request #98 from DirkUK/master

Fix relative links
Update spi/README.md

SDA doesn't figure in the text, only the datasheet.

According to http://elinux.org/RPi_BCM2835_GPIOs, SPI0 has only 2 chip selects.
The datasheet mentions a Chip Select 2 for the CS register, but this appears to be an error.
Correct B+ revision number, close #91
Fix link to DXF file
Save as example.mp3 for consistency, close #102
R2 is 10k
correct the number of ALT settings

fixes #100
Add build and link tests
Fix a typo
Add an alt