Updates pull request from Roman Tsypuk to convert the build system from

ant to gradle.  Removes linux and windows application launch scripts and
produces an executable jar with all resources included.

src/main/java/io/github/dsheirer/util/TimeStamp.java

@@ -0,0 +1,118 @@
+/*******************************************************************************
+ *     SDR Trunk 
+ *     Copyright (C) 2014 Dennis Sheirer
+ * 
+ *     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 io.github.dsheirer.util;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class TimeStamp
+{
+	private static SimpleDateFormat mSDFDate = new SimpleDateFormat( "yyyyMMdd" );
+	private static SimpleDateFormat mSDFTime = new SimpleDateFormat( "HHmmss" );
+	private static SimpleDateFormat mSDFTimeWithMilliseconds = new SimpleDateFormat( "HHmmss.SSS" );
+
+	/**
+	 * Returns the current system date formatted as yyyy-MM-dd
+	 */
+	public static String getFormattedDate()
+	{
+		return getFormattedDate( System.currentTimeMillis() );
+	}
+
+	/**
+	 * Returns the timestamp formatted as a date of yyyy-MM-dd
+	 */
+	public static String getFormattedDate( long timestamp )
+	{
+		return mSDFDate.format( new Date( timestamp ) );
+	}
+	
+	/**
+	 * Returns the current system time formatted as HH:mm:ss
+	 */
+	public static String getFormattedTime()
+	{
+		return getFormattedTime( System.currentTimeMillis() );
+	}
+
+	/**
+	 * Returns the timestamp formatted as a time of HH:mm:ss
+	 */
+	public static String getFormattedTime( long timestamp )
+	{
+		return mSDFTime.format( new Date( timestamp ) );
+	}
+
+	/**
+	 * Returns the timestamp formatted as a time of HH:mm:ss
+	 */
+	public static String getFormattedTimeWithMilliseconds( long timestamp )
+	{
+		return mSDFTimeWithMilliseconds.format( new Date( timestamp ) );
+	}
+
+	/**
+	 * Returns current system time formatted as yyyy-MM-dd*HH:mm:ss
+	 * with the * representing the separator attribute
+	 */
+	public static String getTimeStamp( String separator )
+	{
+		return getTimeStamp( System.currentTimeMillis(), separator );
+	}
+	
+	/**
+	 * Returns timestamp formatted as yyyy-MM-dd*HH:mm:ss
+	 * with the * representing the separator attribute
+	 */
+	public static String getTimeStamp( long timestamp, String separator )
+	{
+		StringBuilder sb = new StringBuilder();
+		
+		sb.append( getFormattedDate( timestamp ) );
+		sb.append( separator );
+		sb.append( getFormattedTime( timestamp ) );
+
+		return sb.toString();
+	}
+	
+	/**
+	 * Returns current system time formatted as yyyy-MM-dd*HH:mm:ss.SSS
+	 * with the * representing the separator attribute
+	 */
+	public static String getLongTimeStamp( String separator )
+	{
+		return getLongTimeStamp( System.currentTimeMillis(), separator );
+	}
+	
+	/**
+	 * Returns timestamp formatted as yyyy-MM-dd*HH:mm:ss.SSS
+	 * with the * representing the separator attribute
+	 */
+	public static String getLongTimeStamp( long timestamp, String separator )
+	{
+		StringBuilder sb = new StringBuilder();
+		
+		sb.append( getFormattedDate( timestamp ) );
+		sb.append( separator );
+		sb.append( getFormattedTimeWithMilliseconds( timestamp ) );
+
+		return sb.toString();
+	}
+	
+}
+