Added 2 new cheatsheets
Added lsof cheatsheet
Added mysql cheatsheet
Took out listing of Readme and License file on cheatsheets
Added histroy cheatsheet
History
Added history cheatsheet
Added history cheatsheet
Merge branch 'master' of https://github.com/ozdemircili/cheat into ozdemircili-master

* 'master' of https://github.com/ozdemircili/cheat:
  Added history cheatsheet
  Added history cheatsheet
  History
  Added histroy cheatsheet
  Took out listing of Readme and License file on cheatsheets
  Added mysql cheatsheet
  Added lsof cheatsheet
  Added 2 new cheatsheets
Trivial changes.
Renamed mysql.sql to mysql, because the installer doesn't seem to install that cheatsheet when it has the .sql extension.