Merge pull request #4 from HimanshuVasishth/master

Adding support for installing openssh package from backports repository
Move backports steps after bootstrap process.
Move prepare sources before install.
Move backports code before bootstrap and add debug logic.
More debugging
Another attempt to fixing backports.
Revert back to head.
Keep bootstrap dir when using backports packages.
Backports packages are not installed in step 16.
Remove keep bootstrap directory.
Force backports repository for backports install.
Fix bug where installing backports packages without calling apt-get update.
Move backports steps after bootstrap process.

Move prepare sources before install.

Move backports code before bootstrap and add debug logic.

More debugging

Another attempt to fixing backports.

Revert back to head.

Keep bootstrap dir when using backports packages.

Backports packages are not installed in step 16.

Remove keep bootstrap directory.

Force backports repository for backports install.

Fix bug where installing backports packages without calling apt-get update.
Merge branch 'master' of github.com:jeremyje/build-debian-cloud
Incorporate review comments.
Merge pull request #5 from jeremyje/master

Move backports steps after bootstrap process.