added glad generator and a glad runtime

tools/glad-0.1.14a0/glad/lang/volt/loader/wgl.py

@@ -0,0 +1,35 @@
+from glad.lang.common.loader import BaseLoader
+from glad.lang.volt.loader.glx import _GLX_LOADER
+
+
+_WGL_LOADER = _GLX_LOADER.replace('GLX', 'WGL')
+_WGL_HAS_EXT = '''
+private bool has_ext(const(char)* name) {
+    return true;
+}
+'''
+
+
+class WGLVoltLoader(BaseLoader):
+    def write_header_end(self, fobj):
+        pass
+
+    def write_header(self, fobj):
+        pass
+
+    def write(self, fobj):
+        fobj.write('import watt.library;\n')
+        if not self.disabled:
+            fobj.write(_WGL_LOADER)
+
+    def write_begin_load(self, fobj):
+        pass
+
+    def write_end_load(self, fobj):
+        fobj.write('\treturn true;\n')
+
+    def write_find_core(self, fobj):
+        pass
+
+    def write_has_ext(self, fobj):
+        fobj.write(_WGL_HAS_EXT)