Different polling times for queue and VMs
Dry run option for starting and stopping VMs
Min quota of VMs (honored in scale down)
Returning only EC2 running instances
Better log messages on shutdown
Scale up with EC2 and max quota
Better function giving only "valid" EC2 instances
EC2 scale down function uses "valid" instances
Fixed wrong behaviour of EC2 scale down

Now quota is honoured by counting the valid VMs instead of counting
only the valid VMs *to shutdown*.
Correct quota also for EC2 scale up
Honor dry run for starting new VMs
Correctly show IP address of terminating VM
Un-basing64 user-data before sending it to boto
Start VMs to honor minimum quota
Created a dir for test (temporary) files
Better init.d script: no hardcoded CVMFS paths
Fixed issue if attaching screen from elastiq user
Fixed crash with invalid EC2 creds
Context for uCernVM installs boto
Context supports Elastiq with EC2

Also: user-data for slaves is created automatically based on user-data
for the master.