Notable changes:
* -R option added. Used to specify a file with a list of files or directories
to remove from root-image.sqfs. This option only works with -T full.
A list of files/directories that will be removed is printed.
* -T purge_us profile removed, now is managed via -R option.
* Profiles looks now:
-T <profile> Type of target image (work is done on root-image.sqfs):
basic: join both images, no changes in root-image
split: 'basic' + split out usr/share/ and lib/modules/ from root-image
full: 'split' + remove specified directories (with -R) from root-image
* Code is now a bit small made by some refactions.
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>