Procedures and functions

getAllInstances	Retrieve a list of Instances from AWS.
getConnString	Generate a connection string.
getConnStringSSH	Generate a connection string for an SSH link.
getConnStringXSRV	Generate a connection string for an xprmsrv server.
getImages	Retrieve a list of AMI from AWS.
loadAEC2Config	Load a configuration file and initialise the package.
runInstance	Start a new instance in EC2.
terminateInstance	Terminate the specified instance.
updateInstance	Update instance information.
waitInstanceReady	Wait for an instance to be ready.