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/min.h

@@ -0,0 +1,28 @@
+#ifndef IGL_MIN_H
+#define IGL_MIN_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+#include <Eigen/Sparse>
+namespace igl
+{
+  // Inputs:
+  //   X  m by n matrix
+  //   dim  dimension along which to take min
+  // Outputs:
+  //   Y  n-long vector (if dim == 1) 
+  //   or
+  //   Y  m-long vector (if dim == 2)
+  //   I  vector the same size as Y containing the indices along dim of minimum
+  //     entries
+  template <typename AType, typename DerivedB, typename DerivedI>
+  IGL_INLINE void min(
+    const Eigen::SparseMatrix<AType> & A,
+    const int dim,
+    Eigen::PlainObjectBase<DerivedB> & B,
+    Eigen::PlainObjectBase<DerivedI> & I);
+}
+#ifndef IGL_STATIC_LIBRARY
+#  include "min.cpp"
+#endif
+#endif
+