Version bump (3.1.0)
Drop euca-create-volume's --zone option

Commit 84efe11 added the --availability-zone option but didn't remove
--zone to avoid breaking scripts.  This commit removes the erroneous
option.

Fixes TOOLS-348
Added feature to allow bucket management for images; either single bucket for all images or separate bucket for each image (kernel, ramdisk, root image)
Cleaned up the argument handling for enabling separate bucket storage for images.
Minor cleanup
Merge branch '3.0-maint'
Merge branch '3.0-maint'
Implement DescribeInstanceStatus
support --kernel and --ramdisk parameters to euca-bundle-upload (required for bundle-instance for Linux instances)
Merge branch '3.0-maint'

Conflicts:
	euca2ools/__init__.py
fix per suggestion by gholmes
Merge remote-tracking branch 'sangmin/master'
Add support for Amazon VPC APIs
Updated all VPC code to move from roboto to requestbuilder backend.
TOOLS-390
euca-describe-images does not show "name" value
Version bump (3.0.2)
Minor help string fixes
Merge branch '3.0-maint'

Conflicts:
	euca2ools/__init__.py
Fix console output parse failure with empty elements

Fixes TOOLS-389
Merge remote-tracking branch 'mmunn1/3.0-maint'