Game settings screen, and minor fix on discordRPC

- Uses BG previously from the input config screen, which has gotten a new BG
- Minor tweak on the input config screen to display all inputs names regardless of if they are bound or not
- Added Mod1 function to `funcs.lua`, may be useful again sometime
- Added game settings
  * Manual locking (per gamemode, per ruleset, on harddrop or on softdrop)
  * Piece colours (per ruleset, TTC or Arika)
  * World Reverse toggle
- Moved the discordRPC `libs/` directory, as it's a third party library
- Edited the `discordRPC.lua` file to look for the dll at the right place regardless of how you run the game (until we fuse it that is)

This should have probably been done in several commits, sorry about that

tetris/components/grid.lua

@@ -143,7 +143,7 @@ function Grid:copyBottomRow()
 	for col = 1, 10 do
 		self.grid[24][col] = (self.grid[23][col] == empty) and empty or {
 			skin = self.grid[23][col].skin,
-			colour = "G"
+			colour = "X"
 		}
 	end
 	return true
@@ -161,7 +161,7 @@ function Grid:applyPiece(piece)
 		if y + 1 > 0 then
 			self.grid[y+1][x+1] = {
 				skin = piece.skin,
-				colour = piece.shape
+				colour = piece.colour
 			}
 		end
 	end
@@ -177,7 +177,7 @@ function Grid:applyBigPiece(piece)
                 if y*2+a > 0 then
                     self.grid[y*2+a][x*2+b] = {
                         skin = piece.skin,
-                        colour = piece.shape
+                        colour = piece.colour
                     }
                 end
 			end

tetris/components/piece.lua

@@ -2,7 +2,7 @@ local Object = require 'libs.classic'
 
 local Piece = Object:extend()
 
-function Piece:new(shape, rotation, position, block_offsets, gravity, lock_delay, skin, big)
+function Piece:new(shape, rotation, position, block_offsets, gravity, lock_delay, skin, colour, big)
 	self.shape = shape
 	self.rotation = rotation
 	self.position = position
@@ -10,6 +10,7 @@ function Piece:new(shape, rotation, position, block_offsets, gravity, lock_delay
 	self.gravity = gravity
 	self.lock_delay = lock_delay
 	self.skin = skin
+    self.colour = colour
 	self.ghost = false
 	self.locked = false
 	self.big = big
@@ -21,7 +22,7 @@ function Piece:withOffset(offset)
 	return Piece(
 		self.shape, self.rotation,
 		{x = self.position.x + offset.x, y = self.position.y + offset.y},
-		self.block_offsets, self.gravity, self.lock_delay, self.skin, self.big
+		self.block_offsets, self.gravity, self.lock_delay, self.skin, self.colour, self.big
 	)
 end
 
@@ -31,7 +32,7 @@ function Piece:withRelativeRotation(rot)
 	while new_rot >= 4 do new_rot = new_rot - 4 end
 	return Piece(
 		self.shape, new_rot, self.position,
-		self.block_offsets, self.gravity, self.lock_delay, self.skin, self.big
+		self.block_offsets, self.gravity, self.lock_delay, self.skin, self.colour, self.big
 	)
 end
 
@@ -148,13 +149,13 @@ function Piece:draw(opacity, brightness, grid, partial_das)
 		local y = self.position.y + offset.y
 		if self.big then
 			love.graphics.draw(
-				blocks[self.skin][self.shape],
+				blocks[self.skin][self.colour],
 				64+x*32+partial_das*2, 16+y*32+gravity_offset*2,
 				0, 2, 2
 			)
 		else
 			love.graphics.draw(
-				blocks[self.skin][self.shape],
+				blocks[self.skin][self.colour],
 				64+x*16+partial_das, 16+y*16+gravity_offset
 			)
 		end