Add "subdir-objects" to AC_INIT_AUTOMAKE

This squelches some warning messages that are emitted during
./autogen.sh.
Update event in Week view when altered or removed: Bug #732671
Merge branch 'master' into wip/725786-edit-recurring
Fleshed out the dialog, input logic in place

Now need to fill in dialog with existing RRULE parameters and save
RRULE parameters when OK is pressed.