this commit also make cachify more exception safe

repo command can now purge cache of database

list -S only list images inside searchable repositories

Image are not crawled anymore in all repositories by default
You needs to specify a list of repo to look in

repo have now -s and -u option
new display and color

this state can be matched by option -l and -r in repo command

this option allow list of image without syncing database. Very useful for completion

is list command now only list image inside repositories.
many option can be given to have a custom output
globbing is allowed on images

This command allow a clean listing of repositories

compute of real path of images to check integrety was poorly coded. Fix it!

new option --preserve, -p is added

Also fix some bug in PipeFile

This commit introduce remote repository and file accross ssh

We now use PipeFile to handle complex file type and compute md5 and filesize.

This commit add the following features in installsystems:
- A download progress bad
- check size before download
- check size after download
- check md5 after download

Signed-off-by: Seblu <sebastien.luttringer@smartjog.com>

Seblu: Fix too many things...

Signed-off-by: Seblu <sebastien.luttringer@smartjog.com>