feat: remove lots of old code

BREAKING CHANGES
 * XEarth diagrams are no longer supported
 * easter egg diagrams are no longer supported
 * plantuml doesn't provide a ftp server anymore
 * hidden "oregon" game removed
 * no more sudoku support
 * removed telnet server

build: update maven compiler plugin + java level to 1.7

Refactor:
 * Override deprecated DirWatcher with DirWatcher2
 * Remove unused package sequencediagram.puma
 * Remove unused package plantuml.hector
 * Remove unused package plantuml.geom
 * Remove unused package plantuml.graph
 * Remove plantuml.hector2
 * Remove unused classes from plantuml.graph2
 * Remove unused package plantuml.api.mda, plantuml.mda
 * Remove unused package plantuml.posimo
 * Remove unused package plantuml.project
 * Remove unused package plantuml.project2
 * Remove unused package plantuml.skin.bluemodern
 * Remove unused class version.Professional
 * Remove unused classes from plantuml.api
 * Remove unused class bpm.FootPrint
 * Remove empty, unused classes
 * Remove math.AsciiMathOld
 * Remove unused flashcode.FlashCodeUtilsNone class
 * Remove unused classes

1 files changed, 0 insertions, 45 deletions

diff --git a/src/net/sourceforge/plantuml/api/mda/option2/MDAUtils.java b/src/net/sourceforge/plantuml/api/mda/option2/MDAUtils.java
deleted file mode 100644
index e09f968..0000000
--- a/src/net/sourceforge/plantuml/api/mda/option2/MDAUtils.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/* ========================================================================
- * PlantUML : a free UML diagram generator
- * ========================================================================
- *
- * (C) Copyright 2009-2017, Arnaud Roques
- *
- * Project Info:  http://plantuml.com
- * 
- * If you like this project or if you find it useful, you can support us at:
- * 
- * http://plantuml.com/patreon (only 1$ per month!)
- * http://plantuml.com/paypal
- * 
- * This file is part of PlantUML.
- *
- * PlantUML 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.
- *
- * PlantUML 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 library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
- * USA.
- *
- *
- * Original Author:  Arnaud Roques
- *
- *
- */
-package net.sourceforge.plantuml.api.mda.option2;
-
-import net.sourceforge.plantuml.mda.MDADiagramImpl;
-
-public class MDAUtils {
-
-	public static MDADiagram getMDADiagram(String plantumlDiagramSource) {
-		return MDADiagramImpl.create(plantumlDiagramSource);
-	}
-}