Add mosh command and install mosh-server on inception VM.
Remove () from mosh & tmux methods
move tmux & mosh onto a new line
Fail fast and helpfully if they don't have MOSH installed locally.
Refactor and add some tests around MOSH
Extend AWS::create_security_group to accept ports args of form port_defn = { ssh: { protocol: "udp", ports: (60000..600050) } }
Ensure required ports are open on Inception VM's security group to enable 50 concurrent MOSH connections
Add method documentation for providers::was::extract_port_definition
Inception preparation now setups up git config for user [closes #77]

Also installs runit to get the chpst command.
NOTE: Users must upgrade their inception VM:

  bosh-bootstrap deploy --upgrade-deps
Bugfix - ports_open? should take account of protocol in its comparison
latest-stemcell is default at moment
Merge overlapping security group ranges
Revert "Merge overlapping security group ranges"

This reverts commit 3e80a41317e2a7e0b957bb7bd3135eef4ad51287.
Overlapping port ranges should create multiple security group rules.  Update tests to validate this.
Added changelog entry for up-coming  command
Remove -d (debug) flag from "rake spec" as ruby-debug not included