Split mod into core, recording, replay, render[todo], paths[todo] and extras[wip] modules

Move everything to com.replaymod package
Add KeyBindingRegistry and SettingsRegistry
Recreate settings GUI with new GUI API and dynamically from SettingsRegistry
Use ReplayFile from ReplayStudio
ReplayHandler is now object oriented
Add GuiOverlay, GuiSlider and GuiTexturedButton to GUI API
Rewrite both overlays to use new GUI API
Fix size capping in vertical and horizontal layout
Allow CustomLayouts to have parents
Fix tooltip rendering when close to screen border
Allow changing of columns in GridLayout

src/main/java/com/replaymod/extras/Extra.java

@@ -0,0 +1,7 @@
+package com.replaymod.extras;
+
+import com.replaymod.core.ReplayMod;
+
+public interface Extra {
+    void register(ReplayMod mod) throws Exception;
+}