Building igl statically and moving to the dep scripts

Fixing dep build script on Windows and removing some warnings.

Use bundled igl by default.

Not building with the dependency scripts if not explicitly stated. This way, it will stay in
Fix the libigl patch to include C source files in header only mode.

src/libigl/igl/quat_to_mat.h

@@ -0,0 +1,30 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+#ifndef IGL_QUAT_TO_MAT_H
+#define IGL_QUAT_TO_MAT_H
+#include "igl_inline.h"
+// Name history:
+//   quat2mat  until 16 Sept 2011
+namespace igl
+{
+  // Convert a quaternion to a 4x4 matrix
+  // A Quaternion, q, is defined here as an arrays of four scalars (x,y,z,w),
+  // such that q = x*i + y*j + z*k + w
+  // Input:
+  //   quat  pointer to four elements of quaternion (x,y,z,w)  
+  // Output:
+  //   mat  pointer to 16 elements of matrix
+  template <typename Q_type>
+  IGL_INLINE void quat_to_mat(const Q_type * quat, Q_type * mat);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "quat_to_mat.cpp"
+#endif
+
+#endif