Start work on snapshot creation
More work on snapshot creating

Dialogs present, but operation still raises an internal error from Amazon
Creation of snapshots now works
Merge branch 'feature/create-snapshot' into develop
Refactor Ec2Manager to improve modularity

This also provides things like a global AWS connection, which is needed for new features
Start on work to be able to list and call scripts
Script running unpolished, untested, but might now work
First working script implementation!

Still needs some work so the log reader displays wget output properly
Log properly shows incomplete lines, when running a script
Merge branch 'feature/scripts' into develop
Format log message boxes as monospace
Allow cancellation of scripts
Minor layout fixes
When terminating, use volume's view model to destroy volume