added gradle-based build script

bc-build.sh

@@ -0,0 +1,51 @@
+VERSION=5.0.0
+MC_VERSION=1.7.2
+FORGE_VERSION=10.12.0.1024
+BUILD_NUMBER=58
+
+build_dir=`pwd`/build-$VERSION
+forge_archive=forge-$MC_VERSION-$FORGE_VERSION-src.zip
+
+rm -rf $build_dir
+mkdir $build_dir
+mkdir $build_dir/forge
+
+cd $build_dir/forge
+
+wget http://files.minecraftforge.net/maven/net/minecraftforge/forge/$MC_VERSION-$FORGE_VERSION/$forge_archive
+
+unzip $forge_archive
+
+./gradlew setupDecompWorkspace
+
+rm -rf src/*
+mkdir src/main
+cp -r ../../common src/main/java
+cp -r ../../buildcraft_resources src/main/resources
+
+(
+cd src/main
+for j in `find .` ; do 
+   if [ ! -d $j ]; then
+      case $j in
+         *Version.java)
+            sed "s/@VERSION@/$VERSION/g" $j > $j.tmp && mv $j.tmp $j
+            sed "s/@MC_VERSION@/$MC_VERSION/g" $j > $j.tmp && mv $j.tmp $j
+            sed "s/@BUILD_NUMBER@/$BUILD_NUMBER/g" $j > $j.tmp && mv $j.tmp $j
+	    ;;
+	 *.info)
+            sed "s/@VERSION@/$VERSION/g" $j > $j.tmp && mv $j.tmp $j
+            sed "s/@MC_VERSION@/$MC_VERSION/g" $j > $j.tmp && mv $j.tmp $j
+            sed "s/@BUILD_NUMBER@/$BUILD_NUMBER/g" $j > $j.tmp && mv $j.tmp $j
+	 ;;
+      esac
+   fi
+done
+)
+
+./gradlew reobf
+
+(
+cd build/libs
+mv *.jar $build_dir/buildcraft-$MC_VERSION-$VERSION.jar
+)