move build_tool to tools

Makefile

@@ -2,7 +2,7 @@ INSTALL_PATH ?= $(CURDIR)
 
 $(shell ./bootstrap.sh)
 
-$(shell ./build_tool/build_config.sh build_config.mk $INSTALL_PATH)
+$(shell ./tools/build_config.sh build_config.mk $INSTALL_PATH)
 
 include build_config.mk
 

README.md

@@ -41,7 +41,7 @@ Create a workspace and checkout ledisdb source
 
     LedisDB supplies a simple script to install leveldb and snappy: 
 
-        sudo sh build_tool/build_leveldb.sh
+        sudo sh tools/build_leveldb.sh
 
     It will default install leveldb at /usr/local/leveldb and snappy at /usr/local/snappy.