C: Signed/unsigned clarification
Merge remote-tracking branch 'upstream/master'
added contact info and norvig's text translated link
Merge remote-tracking branch 'upstream/master'
Ruby. Difference between class instance variables and class variables
Merge branch 'master' of github.com:greybird/learnxinyminutes-docs
Merge pull request #167 from cssmagic/master

Fix tiny typos.
Merge pull request #166 from greybird/master

Add Ruby
Merge pull request #165 from Willyfrog/correction_link

added contact info and norvig's text translated link
fixed some broken / missing markdown links and added a resource
Merge pull request #169 from eranation/patch-1

fixed some broken / missing markdown links and added a resource
Merge pull request #1 from adambard/master

Merge latest updates form original repo.