Converted ShatteredPD to Build from Gradle

Major Changes:
- Shattered now builds effortlessly either from gradle CLI or android studio
- Much better dependency management through gradle (although it's not really used atm)
- Separate PD-classes repo is now SPD-classes module within main repo

SPD-classes/src/main/java/com/watabou/glscripts/Script.java

@@ -0,0 +1,86 @@
+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2015  Oleg Dolya
+ *
+ * Shattered Pixel Dungeon
+ * Copyright (C) 2014-2016 Evan Debenham
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package com.watabou.glscripts;
+
+import java.util.HashMap;
+
+import com.watabou.glwrap.Program;
+import com.watabou.glwrap.Shader;
+
+public class Script extends Program {
+
+	private static final HashMap<Class<? extends Script>,Script> all =
+		new HashMap<Class<? extends Script>, Script>();
+	
+	private static Script curScript = null;
+	private static Class<? extends Script> curScriptClass = null;
+	
+	@SuppressWarnings("unchecked")
+	public static<T extends Script> T use( Class<T> c ) {
+		
+		if (c != curScriptClass) {
+			
+			Script script = all.get( c );
+			if (script == null) {
+				try {
+					script = c.newInstance();
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+				all.put( c, script );
+			}
+			
+			if (curScript != null) {
+				curScript.unuse();
+			}
+			
+			curScript = script;
+			curScriptClass = c;
+			curScript.use();
+
+		}
+		
+		return (T)curScript;
+	}
+	
+	public static void reset() {
+		for (Script script:all.values()) {
+			script.delete();
+		}
+		all.clear();
+		
+		curScript = null;
+		curScriptClass = null;
+	}
+	
+	public void compile( String src ) {
+
+		String[] srcShaders = src.split( "//\n" );
+		attach( Shader.createCompiled( Shader.VERTEX, srcShaders[0] ) );
+		attach( Shader.createCompiled( Shader.FRAGMENT, srcShaders[1] ) );
+		link();
+
+	}
+	
+	public void unuse() {
+	}
+}