Merge pull request #3 from jurov/master

Added several new functions
Update README.md

If this is incorrect, tell me.
Merge pull request #4 from smickles/patch-1

Update README.md
Convert setup.py to use setuptools and define entry point for
'mpex' executable script. After 'setup.py install', user can
run mpex by simply typing 'mpex'.

Fixed install requirement to use full gnupg package name
Merge pull request #5 from pschork/master

Installer imrpovements
Merge branch 'master' of git://github.com/jurov/pyMPEx into jurov-master

Conflicts:
	mpex.py
Merge remote-tracking branch 'upstream/master'

Conflicts:
	mpex.py