Added proguard 4.7 files

please note that proguard is not yet implmented
refs #17

public/proguard/bin/proguardgui.bat

@@ -0,0 +1,14 @@
+@ECHO OFF
+
+REM Start-up script for the GUI of ProGuard -- free class file shrinker,
+REM optimizer, obfuscator, and preverifier for Java bytecode.
+REM
+REM Note: when passing file names containing spaces to this script,
+REM       you'll have to add escaped quotes around them, e.g.
+REM       "\"C:/My Directory/My File.txt\""
+
+IF EXIST "%PROGUARD_HOME%" GOTO home
+SET PROGUARD_HOME=..
+:home
+
+java -jar "%PROGUARD_HOME%"\lib\proguardgui.jar %*