Fixes #373, add filter for month and year
Fixes #373, add filter for month and year

coders4help/volunteer_planner,pitpalme/volunteer_planner,klinger/volunteer_planner,volunteer-planner/volunteer_planner,christophmeissner/volunteer_planner,klinger/volunteer_planner,coders4help/volunteer_planner,christophmeissner/volunteer_planner,pitpalme/volunteer_planner,volunteer-planner/volunteer_planner,pitpalme/volunteer_planner,volunteer-planner/volunteer_planner,volunteer-planner/volunteer_planner,klinger/volunteer_planner,christophmeissner/volunteer_planner,pitpalme/volunteer_planner,coders4help/volunteer_planner,klinger/volunteer_planner,christophmeissner/volunteer_planner,coders4help/volunteer_planner