Patch to replace AtomDB 2.0 with 2.0.1 in xspec

We have updated the current HEAsoft release downloads to replace AtomDB 2.0 with AtomDB 2.0.1 following the discovery of an error in the 2.0 RRC data. If you have already downloaded HEAsoft 6.11 (containing XSPEC 12.7.0) you can either get the fix from the HEAsoft issues page (http://heasarcdev.gsfc.nasa.gov/lheasoft/issues.html) or patch 12.7.0e from the XSPEC bugs page (http://xspec.gsfc.nasa.gov/docs/xanadu/xspec/bugs.html).