Add Debian wheezy/sid base box templates

Refactor boxes rake task

Create common directory for common installation scripts

Move Debian/Ubuntu common installation scripts
Add ping package to test networking after build
Fix $LANG support
Non interactive babushka install
Wrong package name for ping tool
Fix bug bypassing following configuration engine
Add CA certificates (needed for curl/wget configuration engine download after downloading)
Fix silent install of Babushka
Make possible to symlink boxes/temp
Support unstable release name for sid
Fix interface name 'vethXXXX' too long (>15)
Remove veth name definition
commenting LXC networking options (configured by vagrant)
remove localepurge
Merge branch 'add_debian_box' of https://github.com/Val/vagrant-lxc into debian-boxes
Minor clean up for debian base boxes scripts
"Merge" in code from debian lxc template that comes with Ubuntu 13.04
Disable `/tmp` cleanup on start for base debian boxes

References #68
Disable cfg engines by default when building base boxes
Add note about soon to come Debian base boxes