Remove docstring reference to CompoundLocation (not merged yet).

Thanks Kai for spotting this.

No need for TravisCI testing, [ci skip]
Bump version ready for Biopython 1.61 release
Today's date for the Biopython 1.61 release
Fixes for epydoc warnings in SearchIO
Fix remaining epydoc warning in SearchIO
Fix epydoc literal sections in SearchIO docstrings
Fix epydoc warning in Bio/__init__.py
Post release version bump
Added the missing DTD file NCBI_Variation.mod.dtd
Nexus: handle & ignore LINK command when parsing (Bug #3408)