Upgrade waf to 2.0.18

Closes #253

lib/ntk

@@ -1 +1 @@
-Subproject commit 71a410b2e1f79f89b453c91ead3c5d668f6a7d97
+Subproject commit dae177189b12f74ea01ac2389b76326c06d9be78

tools.waf/ntk_fluid.py

@@ -0,0 +1,18 @@
+from waflib import Task
+from waflib.TaskGen import extension
+
+class ntk_fluid(Task.Task):
+	color   = 'BLUE'
+	ext_out = ['.h']
+	run_str = '${NTK_FLUID} -c -o ${TGT[0].abspath()} -h ${TGT[1].abspath()} ${SRC}'
+
+@extension('.fl')
+def fluid(self, node):
+	"""add the .fl to the source list; the cxx file generated will be compiled when possible"""
+	cpp = node.change_ext('.C')
+	hpp = node.change_ext('.H')
+	self.create_task('ntk_fluid', node, [cpp, hpp])
+
+	if 'cxx' in self.features:
+		self.source.append(cpp)
+

wscript

@@ -31,7 +31,7 @@ def configure(conf):
     conf.load('compiler_c')
     conf.load('compiler_cxx')
     conf.load('gnu_dirs')
-    conf.load('ntk_fluid')
+    conf.load('ntk_fluid',tooldir='tools.waf')
     conf.load('gccdeps')
     conf.line_just = 52