RelativeLink.sh: cd to "$(dirname $0)" if it exists
RelativeLink.sh: cd to "$(dirname $0)" if it exists

This script relies on App et al existing in the CWD. Try to find out
where it is and cd to it.

This makes it possible to start the script via e.g. GNOME launchers,
which don't change the CWD.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>

svn:r23017

Shondoit/torbrowser,Shondoit/torbrowser,Shondoit/torbrowser,Shondoit/torbrowser