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/utils/Highlighter.java

@@ -0,0 +1,81 @@
+/*
+ * 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.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Highlighter {
+
+	private static final Pattern HIGHLIGHTER	= Pattern.compile( "_(.*?)_" );
+	private static final Pattern STRIPPER		= Pattern.compile( "[ \n]" );
+
+	public String text;
+
+	public boolean[] mask;
+
+	public Highlighter( String text ) {
+
+		String stripped = STRIPPER.matcher( text ).replaceAll( "" );
+		mask = new boolean[stripped.length()];
+
+		Matcher m = HIGHLIGHTER.matcher( stripped );
+
+		int pos = 0;
+		int lastMatch = 0;
+
+		while (m.find()) {
+			pos += (m.start() - lastMatch);
+			int groupLen = m.group( 1 ).length();
+			for (int i=pos; i < pos + groupLen; i++) {
+				mask[i] = true;
+			}
+			pos += groupLen;
+			lastMatch = m.end();
+		}
+
+		m.reset( text );
+		StringBuffer sb = new StringBuffer();
+		while (m.find()) {
+			m.appendReplacement( sb, m.group( 1 ) );
+		}
+		m.appendTail( sb );
+
+		this.text = sb.toString();
+	}
+
+	public boolean[] inverted() {
+		boolean[] result = new boolean[mask.length];
+		for (int i=0; i < result.length; i++) {
+			result[i] = !mask[i];
+		}
+		return result;
+	}
+
+	public boolean isHighlighted() {
+		for (int i=0; i < mask.length; i++) {
+			if (mask[i]) {
+				return true;
+			}
+		}
+		return false;
+	}
+}