Be more specific which files we feed to doxygen.
Be more specific which files we feed to doxygen.

Specifically, make sure that we exclude the doc/news/changes/README.md file.

sairajat/dealii,kalj/dealii,danshapero/dealii,naliboff/dealii,danshapero/dealii,EGP-CIG-REU/dealii,sairajat/dealii,naliboff/dealii,naliboff/dealii,EGP-CIG-REU/dealii,danshapero/dealii,EGP-CIG-REU/dealii,kalj/dealii,naliboff/dealii,kalj/dealii,naliboff/dealii,naliboff/dealii,EGP-CIG-REU/dealii,kalj/dealii,sairajat/dealii,danshapero/dealii,kalj/dealii,EGP-CIG-REU/dealii,danshapero/dealii,sairajat/dealii,sairajat/dealii,kalj/dealii,danshapero/dealii,danshapero/dealii,naliboff/dealii,EGP-CIG-REU/dealii,sairajat/dealii,sairajat/dealii,EGP-CIG-REU/dealii,kalj/dealii