set version back to dev
fix security_groups override test
add --delete flag

This makes more sense, and better matches behavior of "real" shared directories behave (say in virtualbox).
update copyright year
Showing how to increase disk size
improved error message for missing ami now includes region info
Merge pull request #204 from zelig/master

improved error message for missing ami now includes region info
Merge pull request #197 from gdi2290/patch-1

update copyright year
Gemspec was too strict, fog should follow semver
Merge pull request #216 from maxlinc/semver

vagrant-aws gemspec is too pessimistic about fog, can cause downgrades that break vagrant
Ignore some RVM files in the repo
When syncing folders use proxy command if it's set
Add a config parameter to specify whether public IP is assigned
Merge pull request #219 from pxsta/associate_public_ip_config

Add a config parameter to specify whether public IP is assigned
Merge pull request #218 from cscetbon/proxy_command

When syncing folders use proxy command if it's set
Update README.md

Specifying security group ID gives the following error without starting any EC2
The security group 'sg-xxxxxxxx' does not exist in default VPC 'vpc-xxxxxxxx' (Fog::Compute::AWS::NotFound)
The EC2 starts after specifying the relevant Security group Name for that ID.
add Configuration block_device_mapping
bugfix: per-region configs didn't work with associate_public_ip
Merge pull request #236 from yuma-iwasaki/update-readme

Update README.md
Merge pull request #231 from droidlabour/patch-1

Update README.md