U fix startup script on linux

Author: fvarrui

src/main/resources/linux/desktop.vtl

@@ -2,7 +2,7 @@
 Name=${info.displayName}
 GenericName=${info.displayName}
 Comment=${info.description}
-Exec=/opt/${info.name}/${info.name}
+Exec=/opt/${info.name}/${info.name} %U
 Icon=/opt/${info.name}/${info.name}.png
 Terminal=false
 Type=Application

src/main/resources/linux/startup.sh.vtl

@@ -1,6 +1,6 @@
 #!/bin/sh
 # GNU/Linux startup script generated by JavaPackager Maven Plugin
-SCRIPTPATH="$(dirname "$(readlink "$0")")"
+SCRIPTPATH=`cd "$(dirname "$0")" ; pwd`
 #if($info.bundleJre)
 JAVA=$SCRIPTPATH/jre/bin/java
 #else