[announce] calcurse 3.1.1 released

This fixes an off-by-one error that can result in garbled panel layout
under certain circumstances (it seems to be quite reproducible when
compiling with clang). The changelog is pretty short this time:

- Bug fixes:
  * Fix another screen corruption bug.

  * Fix several compiler warnings.

As usual, the new release tarball is available from the download section
of our website [1]. Please report any bugs to the bugs mailing list at
bugs at calcurse dot org.

[1] http://calcurse.org/downloads/