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.cpp

@@ -0,0 +1,41 @@
+#include "min.h"
+#include "for_each.h"
+#include "find_zero.h"
+
+template <typename AType, typename DerivedB, typename DerivedI>
+IGL_INLINE void igl::min(
+  const Eigen::SparseMatrix<AType> & A,
+  const int dim,
+  Eigen::PlainObjectBase<DerivedB> & B,
+  Eigen::PlainObjectBase<DerivedI> & I)
+{
+  const int n = A.cols();
+  const int m = A.rows();
+  B.resize(dim==1?n:m);
+  B.setConstant(std::numeric_limits<typename DerivedB::Scalar>::max());
+  I.resize(dim==1?n:m);
+  for_each(A,[&B,&I,&dim](int i, int j,const typename DerivedB::Scalar v)
+    {
+      if(dim == 2)
+      {
+        std::swap(i,j);
+      }
+      // Coded as if dim == 1, assuming swap for dim == 2
+      if(v < B(j))
+      {
+        B(j) = v;
+        I(j) = i;
+      }
+    });
+  Eigen::VectorXi Z;
+  find_zero(A,dim,Z);
+  for(int j = 0;j<I.size();j++)
+  {
+    if(Z(j) != (dim==1?m:n) && 0 < B(j))
+    {
+      B(j) = 0;
+      I(j) = Z(j);
+    }
+  }
+}
+