add initial waf build script and source

wscript

@@ -0,0 +1,11 @@
+def options(opt):
+    opt.load("compiler_cxx")
+
+def configure(cnf):
+    cnf.load("compiler_cxx")
+
+def build(bld):
+    bld(features = "cxx cxxprogram",
+        target = "svi",
+        source = bld.path.ant_glob("src/**/*.cc"),
+        cflags = ["-Wall"])