commented out the mapping to a script local function in another file. I suspect MyPopup() function might be a function for debugging.
The variable g:org_agenda_files doen't work, but g:agenda_files does. I was confused with the document, so corrected it.
removed unspecified characters encoded as 0x91 or 0x92
fixed g:agenda_dirs to g:org_agenda_select_dirs in helpfile(doc/vimorg.otxt), because org_agenda_select_dirs is on effect in ftplugin/org.vim
Merge branch 'commentedout-mapping-to-MyPopup'