SG `bosh_agent_http` renamed to `bosh_agent_https`

same 6868 port for talking to bosh_agent running in https mode
(`bosh_agent_http` can be deleted)
bosh_agent_http -> bosh_agent_https that escaped previous commit
microbosh has smaller 4G volume

Now automatically works on devstack (openstack)
document 4G volume change in changelog
Do not open SG for 6868 bosh agent port [fixes #215]

This is a security fix - external users could directly access the bosh_agent
on a microbosh.

`bosh micro deploy` accesses the agent on 6868 via an ssh tunnel
setup ssh keypair before 'ssh' action [fixes #210]
Fix ssh_spec
Add missing file
Revert "Do not open SG for 6868 bosh agent port [fixes #215]"

This reverts commit 2abca7e813190e56e664d64821ce7584242793ab.
Fix unit spec
fix #207, "Could not locate Gemfile" error
Merge pull request #217 from ryfow/locate-gemfile

fix #207, "Could not locate Gemfile" error
bump to 0.11.5
Don't require Bundler at runtime.

Note that this reverts commits 1c5979d and 060fa5a, requiring you to
"bundle exec" if you're running "bin/bosh-bootstrap" from within
the gem source directory.

Fixes cloudfoundry-community/bosh-bootstrap#218.
Fixes cloudfoundry-community/bosh-bootstrap#219.
Merge pull request #220 from mdub/no_bundler_at_runtime

Don't require Bundler at runtime.
Open port 53 on microbosh for powerdns [fixes #221]