Use -t to make ctrl+c work
Remove the boostrap step

It's implicit in chroot builds. For normal linux builds, I think
it's better to let developers deal with installing the required
packages.
Default to chroot builds also on Fedora
For b2g keep objects inside the source directory

And copy dist/bin to the build directory.

This will make it easier to build snapshots.
Remove the mount directory after cleaning all
Rewrite the snapshots code
Revert unintentional change
Run pep8 in the build step
Don't require fingerprints confirmation
Should be fine to include the stamps
Update b2g paths
Check that losetup is installed
Revert "Check that losetup is installed"

This reverts commit 7943ad8d0584a006c9c4678c447d18e1a2b7def5.
B2G_PATH is now unused
Add /sbin to the path when running sudo commands
Pass PATH to add_path
Fix clean command
Add also /usr/sbin
Catch the right exception
Get rid of the stop action, now unnecessary