cosmetic changes
depth=1 on git pull to save DL & storage space and source update time
fix: re-read config files on deb creation

if parameter action = 'build' was used (or not specified) and .deb pkg
version was read from sources it wasn't via hook scripts, it wasn't
properly used for .deb creation
install ca-certificates by default, smaller (64M->32M) boot partition
fix: depth=1 on git pull only if git repository cloned with git:// url

(and not http://)
run pre-build hooks in native env
fix: don't descent deeper than needed with find