Merge pull request #71 from planctechnologies/master

Instance inspector improvements
Fixes pretty logging error if the settings directory doesn't exist.
Do not use relative paths for configs.
Fixes empty cloud provider in settings (temporary fix).
Bump version to 1.0a7.
Hide cloud stuff for the alpha7 release.
Do not load cloud settings for the alpha7 release.
Fixes issue with relative image paths.
Node labels must be selectable.
Bump to version 1.0a8.dev1 and reactivate cloud features.
Fixes error when connecting an IOU device to a cloud.
Fixes size restoration issues for rectangles and ellipses when loading a project.
New feature: insert image on the view.
Add some tooltips in preference and configuration pages.
Fixes #72.
Default port configuration for Ethernet switch and hub devices.
New feature: import/export device configs.
Fixes issue when deleting note items that have parent items.
Check the minimum required RAM when adding IOS images.
Start a packet capture from the device contextual menu.
Improvements on the topology summary and link highlighting.