Move all the things (YES. Move them.)

Also, implemented some basic modlist logic, to be wired up.

depends/util/src/pathutils.cpp

@@ -0,0 +1,94 @@
+/* Copyright 2013 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/pathutils.h"
+
+#include <QFileInfo>
+#include <QDir>
+
+QString PathCombine(QString path1, QString path2)
+{
+	if (!path1.endsWith('/'))
+		return path1.append('/').append(path2);
+	else
+		return path1.append(path2);
+}
+
+QString PathCombine(QString path1, QString path2, QString path3)
+{
+	return PathCombine(PathCombine(path1, path2), path3);
+}
+
+QString AbsolutePath(QString path)
+{
+	return QFileInfo(path).absolutePath();
+}
+
+QString badFilenameChars = "\"\\/?<>:*|!";
+
+QString RemoveInvalidFilenameChars(QString string, QChar replaceWith)
+{
+	for (int i = 0; i < string.length(); i++)
+	{
+		if (badFilenameChars.contains(string[i]))
+		{
+			string[i] = replaceWith;
+		}
+	}
+	return string;
+}
+
+QString DirNameFromString(QString string, QString inDir)
+{
+	int num = 0;
+	QString dirName = RemoveInvalidFilenameChars(string, '-');
+	while (QFileInfo(PathCombine(inDir, dirName)).exists())
+	{
+		num++;
+		dirName = RemoveInvalidFilenameChars(dirName, '-') + QString::number(num);
+		
+		// If it's over 9000
+		if (num > 9000)
+			return "";
+	}
+	return dirName;
+}
+
+bool ensurePathExists(QString filenamepath)
+{
+	QFileInfo a ( filenamepath );
+	QDir dir;
+	return (dir.mkpath ( a.path() ));
+}
+
+bool copyPath(QString src, QString dst)
+{
+	QDir dir(src);
+	if (!dir.exists())
+		return false;
+
+	foreach (QString d, dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot))
+	{
+		QString dst_path = dst + QDir::separator() + d;
+		dir.mkpath(dst_path);
+		copyPath(src+ QDir::separator() + d, dst_path);
+	}
+
+	foreach (QString f, dir.entryList(QDir::Files))
+	{
+		QFile::copy(src + QDir::separator() + f, dst + QDir::separator() + f);
+	}
+	return true;
+}