Replaced broken link for SQL Injection with a working one.
Updating site config and README

Newer versions of jekyll want things a little different.
Merge pull request #37 from peterfpeterson/config_changes

Updating site config and README
Merge pull request #36 from mchandx/master

Replaced broken link for SQL Injection with a working one.
Added Express cheat sheet.
Merge pull request #39 from zahid/master

Added Express cheat sheet.
added mongo-shell cheatsheet
Merge pull request #40 from zahid/mongo-shell

Added mongo-shell cheatsheet
Merge remote-tracking branch 'upstream/master'