Log Message:
devel/guile-lib: Update to 0.2.8.1

packaging change: Add license.  This is messy; in theory each module
has a license.  But they all seem gpl3 compatible, so call it tht.

***  Noteworthy changes in 0.2.8.1

Here is a summary of the noteworthy changes in this release. See
Guile-Lib's [[http://git.savannah.nongnu.org/cgit/guile-lib.git][git summary]] \ 
and [[http://git.savannah.nongnu.org/cgit/guile-lib.git/log/][git log]] for a \ 
complet description.

**** Fixing an empty guile-library.info in 0.2.8

***  Noteworthy changes in 0.2.8

Here is a summary of the noteworthy changes in this release. See
Guile-Lib's [[http://git.savannah.nongnu.org/cgit/guile-lib.git][git summary]] \ 
and [[http://git.savannah.nongnu.org/cgit/guile-lib.git/log/][git log]] for a \ 
complet description.

**** The (logging logger)

***** New #:source-properties keyword argument

The log-helper and default-log-formatter procedures now accept and
process a #:source-properties keyword argument.

***** New <log-handler> flush-on-emit? slot

Support added for a <log-handler> flush-on-emit? slot, default value #t,
queried by the accept-log method to trigger a flush-log method call upon
emit, accordingly.