Merge branch 'next'

* next:
  chore, also build (not-yet-existant) travis branch
  chore, build master branch of twsapi
  Revert "chore, kick deprecated ACLOCAL_AMFLAGS"
  chore, update sxe-compiler.m4 macro package
  minor, parse uri string into tws_uri_s object and use that throughout twsgluum
  minor, quit support for multiple tws, shorten connections to a single URI
  chore, move unconst() global (to nifty.h)
  fix, only call twsc_conn_clos() with non-NULL context
  minor, adapt quo-tws to sreq objects, iterate after deserialisation
  minor, define subscription requests as tws_sreq_t linked list
  minor, parse qmeta and rmeta elements, and tws attribute
  chore, alias wavegoodbye locally for tws_stop()
  chore, kick wavegoodbye() checks altogether
  fix, PEBKAC, actually define wavegoodbye alias when twsapi has NOT got the wavegoodbye() routine
  chore, kick deprecated ACLOCAL_AMFLAGS
  minor, check for new handshake functions in recent twsapis (wavegoodbye is missing)