connect to the correct EC2 region
Merge pull request #1 from zacwitte/master

Use the availability zone to determine the correct EC2 region to connect to
Merge branch 'master' of https://github.com/beichhor/raidformer

Conflicts:
	raidformer.py
Updated README

Merged changes from the wonderful work of beichhor (Benn Eichhorn) and
gave him credit in the README.
adding device to volume group name