Update to 0.0.15

Changelog:
0.0.15
 - improved spacing for cyrillics (#703588)
 - fixed hinting on numerals (704084)
 - bold outlines improved (#706358)
 - improved cyrillics (#706358)
 - improved outlines and spacing (#703115)
 - missing romanian accent glyphs (#705004)
 - uppercase U shape improvements (#702955)

0.0.14
 - Large improvement to shapes of latin and extended latin glyphs (Pooja Saxena)
 - Improvements to the numeral shapes (Pooja)
 - Greatly improved horizontal metrics of regular weight (Pooja)
 - Corrected maths (Pooja)
 - Corrected outlines & metrics of Cyrillics (Pooja)

0.0.13
 - many l/rbearking tweaks
 - extra symbols for Shell (bug #657957)
 - balanced shape for s and S
 - balanced shape for 6 and 9
 - balanced 2 and 3
 - improved hhints
 - OT anchors for accents
 - contrast tweaks to bold (b, B, e)
Updated fonts/cantarell-fonts to 0.0.15
Update to 3.5.2

Changelog:
2013-07-10  v3.5.2  allow ENV vars to be set from repo options, for use in
                    triggers and hooks

                    bug-fix: the new set-default-roles feature was being
                    invoked on every run of "perms" and overriding it!
Updated devel/gitolite to 3.5.2