Import Upstream version 0.7.0

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diff --git a/addons/batikvis/src/main/java/de/lmu/ifi/dbs/elki/visualization/colors/ColorLibrary.java b/addons/batikvis/src/main/java/de/lmu/ifi/dbs/elki/visualization/colors/ColorLibrary.java
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+++ b/addons/batikvis/src/main/java/de/lmu/ifi/dbs/elki/visualization/colors/ColorLibrary.java
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+package de.lmu.ifi.dbs.elki.visualization.colors;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2015
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Color scheme interface
+ * 
+ * @author Erich Schubert
+ */
+public interface ColorLibrary {
+  /**
+   * List of line colors
+   */
+  final static String COLOR_LINE_COLORS = "line.colors";
+
+  /**
+   * Named color for the page background
+   */
+  final static String COLOR_PAGE_BACKGROUND = "page.background";
+
+  /**
+   * Named color for a typical axis
+   */
+  final static String COLOR_AXIS_LINE = "axis.line";
+
+  /**
+   * Named color for a typical axis tick mark
+   */
+  final static String COLOR_AXIS_TICK = "axis.tick";
+
+  /**
+   * Named color for a typical axis tick mark
+   */
+  final static String COLOR_AXIS_MINOR_TICK = "axis.tick.minor";
+
+  /**
+   * Named color for a typical axis label
+   */
+  final static String COLOR_AXIS_LABEL = "axis.label";
+
+  /**
+   * Named color for the background of the key box
+   */
+  final static String COLOR_KEY_BACKGROUND = "key.background";
+
+  /**
+   * Named color for a label in the key part
+   */
+  final static String COLOR_KEY_LABEL = "key.label";
+
+  /**
+   * Background color for plot area
+   */
+  final static String COLOR_PLOT_BACKGROUND = "plot.background";
+
+  /**
+   * Return the number of native colors available. These are guaranteed to be
+   * unique.
+   * 
+   * @return number of native colors
+   */
+  public int getNumberOfNativeColors();
+
+  /**
+   * Return the i'th color.
+   * 
+   * @param index color index
+   * @return color in hexadecimal notation (#aabbcc) or color name ("red") as
+   *         valid in CSS and SVG.
+   */
+  public String getColor(int index);
+}