0.6pre1 - introduce the final changes

- implement E1xy/E2xy Defle bug when using same note twice
- add SNK Touchdown Fever preset
- update README.md and to-do list
- update credits

thank you for your patience!

see you in 0.6pre1.5 coming soon...

src/gui/compatFlags.cpp

@@ -115,6 +115,10 @@ void FurnaceGUI::drawCompatFlags() {
     if (ImGui::IsItemHovered()) {
       ImGui::SetTooltip("does this make any sense by now?");
     }
+    ImGui::Checkbox("E1xy/E2xy stop when repeating the same note",&e->song.e1e2StopOnSameNote);
+    if (ImGui::IsItemHovered()) {
+      ImGui::SetTooltip("ugh, if only this wasn't a thing...");
+    }
     ImGui::Checkbox("SN76489 duty macro always resets phase",&e->song.snDutyReset);
     if (ImGui::IsItemHovered()) {
       ImGui::SetTooltip("when enabled, duty macro will always reset phase, even if its value hasn't changed.");