Added in an edit option that allows a user to edit the cheatsheet from their default editor. Also made some visual changes to the output of the cheatsheet.
Added in a create option also
Merge branch 'master' of https://github.com/bradtse/cheat into bradtse-master

* 'master' of https://github.com/bradtse/cheat:
  Added in a create option also
  Added in an edit option that allows a user to edit the cheatsheet from their default editor. Also made some visual changes to the output of the cheatsheet.
Removed the asterisks denoting the boundaries of the cheatsheets.
When creating a new cheatsheet using the -c option, the program now
first attempts to write to the ~/.cheat directory, or alternatively
create it if it does not already exist. Failing that, it attempts to
write to the python package directory.
Wrapped some more parenthesis around print statements to retain compatibility with Python 3.3.