Merge pull request #34 from unixtastic/master

Add allocate_vpc_address plus minor documentation changes.
Merge pull request #35 from unixtastic/master

Added egress rules to describe_security_groups.
Replace 35 instances of the same code with a subroutine.
Fix some incorrect comments.
Merge branch 'master' of https://github.com/mrallen1/net-amazon-ec2
Add disassociate_address support for VPC addresses.
Fixup inconsistent whitespace and alignment.
Roll 0.27
Merge branch 'master' of https://github.com/mrallen1/net-amazon-ec2