bump, go back to git version numbers after 0.3.1 release
chore, zap to latest yuck version, free of PKG_CHECK()
chore, do away with pkg-config for travis build
Merge branch 'bld/yuck'

* bld/yuck:
  chore, do away with pkg-config for travis build
  chore, zap to latest yuck version, free of PKG_CHECK()
chore, zap to latest sxe-compiler.m4, without native/xHost
chore, get rid of sxe-aux.m4, no macro therein has been used for awhile
fix to fix, kick SXE_LANG_WERROR from c.ac
Merge branch 'bld/configure'

* bld/configure:
  fix to fix, kick SXE_LANG_WERROR from c.ac
  chore, get rid of sxe-aux.m4, no macro therein has been used for awhile
  chore, zap to latest sxe-compiler.m4, without native/xHost
chore, don't build yuck in build-aux/ upon make clean
Merge branch 'bld/yuck'

* bld/yuck:
  chore, don't build yuck in build-aux/ upon make clean