Added numerous of previously published xkcd strips

The full list includes:
0053 Hobby
0719 Brain Worms
0790 Control
0854 Learning to Cook
0857 Archimedes
0910 Permanence
0968 Everything
1156 Conditioning
1169 Expedition
Merge pull request #2 from Fat-Zer/master

Added numerous of previously published xkcd strips