Merge branch 'next'

* next:
  chore, build twsapi dynamically
  chore, adapt linker flags
  chore, turn on verbose build for travis CI
  chore, skip LDFLAGS check, adapt to updated sxe-compiler.m4
  chore, remove unnecessary m4 macro packs
  chore, update sxe-compiler.m4
  chore, make sure gperf outputs ansi-c
  hygiene, don't return variables uninitialised
  fix, PEBKAC, don't decl static routine extern
  chore, add gperf to travis ci build deps
  chore, handshake functionality is in hroptatyr fork of twsapi
  chore, install twsapi from git into /usr and call ldconfig
  chore, output config.log when configure script fails
  chore, allow build based on released twsapi to fail
  chore, build the next branch of twsapi.git
  fix, PEBKAC, assign a strdup()'d version of nick upon TWS_CB_PRE_CONT_DTL
  fix, PEBKAC, do reassign the nicks from sdef's now,