Merge branch 'next'

# By Sebastian Freundt (14) and Ruediger Meier (1)
* next:
  minor, refactor ute_tick and support candles and snaps
  minor, provide mex tick iterator ute_tick
  minor, refactor ute_nticks, provide umx_get_nticks() caching getter
  minor, refactor inlines in ute_handle.h and make make_umx_handle() one of them
  fix, pass on UO_ANON flags to ute_sort()
  minor, provide ute_slut mex function mimicking ute-slut(1)
  minor, provide tick count getter ute_nticks
  minor, put hard handle work into ute_handle.h
  fix test/mux.13.ut, outile was deleted on bigendian systems
  minor, provide (matlab) ute_open() and ute_close()
  chore, check for mex.h in MATLABROOT/extern/include and set matlab_CFLAGS accordingly
  chore, visit aux subdir where matlab clients will be built
  chore, cosmetics, update copyright info on Makefile.am
  minor, check for matlab in order to provide mex clients
  minor, import sxe-matlab.m4