GPIO introduction: Work in progress.
GPIO introduction: Update.
GPIO introduction: Update.
I2C introduction: Initial import.
I2C introduction: Update.
Added pictures.
Article cleanup.
Added picture references to article.
Updated I2C article.
More work on the I2C article.
I2C article: Added command line section. Added schematics.
GPIO article: Added photograph.
GPIO & I2C article: updates / cleanups.
GPIO article: Cleanup.
Fixed author details.
Merge pull request #1 from andec/master

Article ready from christoph