update version to 0.7.7-dev
update version to 0.7.7-dev

Kociamber/ex_admin,whitepaperclip/ex_admin,romul/ex_admin,romul/ex_admin,kleinernik/ex_admin,Kociamber/ex_admin,smpallen99/ex_admin,whitepaperclip/ex_admin,kleinernik/ex_admin,smpallen99/ex_admin