sas-2013: add the forgotten merge-sort.c symlink
build-aux: update compatibility patches for old versions of GCC
docs/README-{fedora,ubuntu}: refer to the latest release
sl/api: fix minor dox issues
sl/symjoin: fix a known bug in rejoinObj()
sl/symabstract: eliminate an unnecessary call to joinData()
cl/storage: implement a new helper - fncByCfg()
sl/glconf: a new place for run-time configuration
sl/glconf: parse comma-separated list of options
sl/fixed_point: a new place for fixed-point plotter
sl/fixed_point: implement basic plotting
sl/fixed_point: plot also trace graph for each shape