minor, include all files needed for libcothr.a in dist

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
hygiene, rename cothread and libcothr.a to coru (and libcoru respectively)

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist'

* bld/dist:
  hygiene, rename cothread and libcothr.a to coru (and libcoru respectively)
  minor, include all files needed for libcothr.a in dist
minor, reestablish travis CI config, clang build will still not work

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist'

* bld/dist:
  minor, reestablish travis CI config, clang build will still not work
chore, PEBKAC, include cocore.h from coru/ subdir

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, list libglod.a before tokyocabinet (to facilitate travis and drone builds)

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist'

* bld/dist:
  chore, list libglod.a before tokyocabinet (to facilitate travis and drone builds)
  chore, PEBKAC, include cocore.h from coru/ subdir