New feature: packet capture for IOU (not working, issue with iouyap).
Merge pull request #21 from planctechnologies/master

Create cloud server images
Bump version to 1.0a7.
Change default projects directory from ~/Documents/GNS3/projects to ~/GNS3/projects.
Bump to version 1.0a8.dev1 and reactivate cloud features.
Check for VPCS version >= 0.5b1
Fixes IOU and VPCS renaming issues.
New feature: import/export device configs.
Default preferences for remote servers.
Find an alternative IOS or IOU image if one cannot be found when importing a topology.
Use Windows interface names instead of their GUID  (more user friendly).
Ask for an alternative interface if one cannot be found.
Bump version to 1.0a8.
Bump to version 1.0b1.dev1.
Base for VirtualBox support.