Separated functions by service.
Closes #1

Moved "private" functions to their own file.
Added hack at the top of Credentials to allow you to use it as a script.
Split out Utility.
Split out CloudFormation.
Split out S3.
Split out EC2.
Split out Route53.
Merge pull request #3 from davidsidlinger/split-up-giant-file
Merge remote-tracking branch 'healthbox/master' into dynamo-support

Conflicts:
	PoshAws.psm1