stop supporting node-waf.

Makefile

@@ -1,20 +1,8 @@
 all:
-	@type node-gyp > /dev/null 2>&1 && make gyp || make waf
-
-waf:
-	node-waf configure build
-
-gyp:
 	node-gyp configure
 	node-gyp build
 
 clean:
-	@type node-gyp > /dev/null 2>&1 && make clean-gyp || make clean-waf
-
-clean-waf:
-	@rm -rf ./build .lock-wscript
-
-clean-gyp:
 	@node-gyp clean 2>/dev/null
 
-.PHONY: all waf gyp clean clean-waf clean-gyp
+.PHONY: all clean

wscript

@@ -1,17 +0,0 @@
-srcdir = "."
-blddir = "build"
-VERSION = "0.0.1"
-
-def set_options(opt):
-  opt.tool_options("compiler_cxx")
-
-def configure(conf):
-  conf.check_tool("compiler_cxx")
-  conf.check_tool("node_addon")
-
-def build(bld):
-  obj = bld.new_task_gen("cxx", "shlib", "node_addon")
-  obj.cxxflags = ["-Wall"]
-  obj.linkflags = []
-  obj.target = "bitcoindjs"
-  obj.source = "src/bitcoindjs.cc"