added monospace functions to fonts

com/danitheskunk/skunkworks/gfx/font/FontTTF.java

@@ -86,6 +86,16 @@ public class FontTTF implements IFont {
 		return false;
 	}
 
+	@Override
+	public boolean isMonospace() {
+		return false;
+	}
+
+	@Override
+	public Vec2i getMonospaceSize() {
+		throw new RuntimeException("Not a monospace font");
+	}
+
 	@Override
 	public int getLineHeight(int ch) {
 		cacheChar(ch);

com/danitheskunk/skunkworks/gfx/font/FontTileset.java

@@ -24,6 +24,16 @@ public class FontTileset implements IFont {
 		return true;
 	}
 
+	@Override
+	public boolean isMonospace() {
+		return true;
+	}
+
+	@Override
+	public Vec2i getMonospaceSize() {
+		return charSize;
+	}
+
 	@Override
 	public int getLineHeight(int ch) {
 		return charSize.getY();

com/danitheskunk/skunkworks/gfx/font/IFont.java

@@ -9,4 +9,6 @@ public interface IFont {
 	ITexture getTexture(int ch);
 	int getXAdvance(int ch);
 	boolean isCP437();
+	boolean isMonospace();
+	Vec2i getMonospaceSize();
 }