Add slack-desc_check.sh.

Signed-off-by: David Spencer <baildon.research@googlemail.com>
Fix slack-desc_check.sh for review comments.

Add copyright line.
Simplify check on number of description lines.
Don't obsess over the handy ruler.

Signed-off-by: David Spencer <baildon.research@googlemail.com>
Add new checks.

install-dir_check.sh
ownership_check.sh
symlink_check.sh
tar113_check.sh

Signed-off-by: David Spencer <baildon.research@googlemail.com>
Add check for unstripped binaries within a package.
Add check for binaries within /usr/share.
Mention new checks in README.
Check the package has correct compression.

Signed-off-by: David Spencer <baildon.research@googlemail.com>
Run clean_filename on dangling symlinks.

Symlinks that are broken return false with '-e' and need to be
matched explicitly with '-L'.

Signed-off-by: David Spencer <baildon.research@googlemail.com>
architecture_check: use case stmt, add more architectures

Signed-off-by: David Spencer <baildon.research@googlemail.com>
permissions_check: Process /etc like /usr.

Signed-off-by: David Spencer <baildon.research@googlemail.com>