run-tests: do not depend on coreutils/realpath

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
travis: simplify/get rid of irrelevant commands

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
MANIFEST.in: more careful spec

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
Allow for convenient interactive/exploratory use

+ mention it in doc/HACKING (Interactive/exploratory use: IPython...)

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
utils_prog: fix syntatic cruft

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
Make defaults (ccs_flatten path, editor) configurable

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>