fixed #1839, #1814, #1747 and #1698
fixed #1597, thank to Alexandre da Silva for patience :)
oops, we have newest #1849, sorry
fixed #1832
Fixed: unable to revert to a previous wiki page version.
Expand RAILS_ROOT path on startup (#1892).
fixed #1818, some strings untranslated
patch #1639, some new strings untranslated
Adds Turkish translation by Ismail Sezen (#1866).
fixed #1632, patch from Станислав Герман-Евтушенко
