Patch for vasp.5.4.4.18Apr17-6-g9f103f2a35

For vasp.5.4.4.18Apr17-6-g9f103f2a35 The following patch addresses a few issues: Fixes a bug in the stress term when using the SCAN functional in certain pathological cases. Fixes a bug in the Thomas-Fermi potential. Fixes a bug that affected the optB88 for some atoms and molecules. Fixes some issues with the BSE at finite q. and adds support for: The CX13 vdW-DFT functional. To apply this patch gunzip the patch file and patch -p0 < patch.5.4.4.16052018 within your vasp.X.X.X root-directory.