Added script to automate building and publishing i2pupdate.zip files

Change the variables DEVDIR and ZIPDIR at the top of the script as appropriate.
Use case (from any directory - useful when already neck-deep in the source):
buildupdate.sh i2p.i2p
Adding -f at the end will clean the build tree first.
Couldn't decide what folder this should go in, so just placing in root.

buildupdater.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+DEVDIR=$HOME/dev
+ZIPDIR=$HOME/builds
+
+if [ -d $DEVDIR/$1 ]
+then
+    cd $DEVDIR/$1
+
+    if [ $# -ge 2 ] && [ $2 == "-f" ]
+    then
+        echo
+        echo "Cleaning up $1 build directories..."
+        echo
+        ant distclean
+    fi
+
+    echo
+    echo "Building update file for $1..."
+    echo
+    ant updater
+
+    echo
+    echo "Copying update file for $1 to eepsite..."
+    if [ ! -d $ZIPDIR/$1 ]
+    then
+        mkdir -p $ZIPDIR/$1
+    else
+        if [ -f $ZIPDIR/$1/i2pupdate.zip ]
+        then
+            rm $ZIPDIR/$1/i2pupdate.zip
+        fi
+    fi
+    mv $DEVDIR/$1/i2pupdate.zip $ZIPDIR/$1
+
+    echo
+    echo "Done!"
+else
+    echo "$1 is not a valid branch!"
+fi