bug 913195: Create mozilla-esr24 branch. r=bhearsum

--HG--
rename : mozilla/l10n-changesets_mozilla-beta => mozilla/l10n-changesets_mozilla-esr24
rename : mozilla/preproduction_release_overrides-esr17.py => mozilla/preproduction_release_overrides-esr24.py
rename : mozilla/release-firefox-mozilla-esr17.py.template => mozilla/release-firefox-mozilla-esr24.py.template
rename : mozilla/staging_release-firefox-mozilla-esr17.py => mozilla/staging_release-firefox-mozilla-esr24.py
rename : mozilla/staging_release-firefox-mozilla-esr17.py.template => mozilla/staging_release-firefox-mozilla-esr24.py.template
rename : mozilla2/linux/mozilla-beta/release/mozconfig => mozilla2/linux/mozilla-esr24/release/mozconfig