Merge branches '6.0' and 'master' of https://github.com/Anuken/Mindustry into 6.0

# Conflicts:
#	core/assets/sprites/block_colors.png
#	core/assets/sprites/sprites.atlas
#	core/assets/sprites/sprites.png
#	core/assets/sprites/sprites3.png
#	core/assets/sprites/sprites5.png
#	core/src/io/anuke/mindustry/graphics/Shaders.java
#	gradle.properties

core/assets/shaders/light.fragment.glsl

@@ -0,0 +1,18 @@
+#ifdef GL_ES
+precision mediump float;
+precision mediump int;
+#endif
+
+#define steprad 0.13
+
+uniform sampler2D u_texture;
+uniform vec4 u_ambient;
+
+varying vec4 v_color;
+varying vec2 v_texCoord;
+
+void main(){
+	vec4 color = texture2D(u_texture, v_texCoord.xy);
+	//color.a = clamp(color.a, 0.0, 0.8);
+	gl_FragColor = clamp(vec4(mix(u_ambient.rgb, color.rgb, color.a), u_ambient.a - color.a), 0.0, 1.0);
+}