Log Message:
tex-unicode-math{,-doc}: update to 0.8o

* Avoid `'Dimension too large' error` for some (unpredictable)
  combinations of font choice and the `Scale` option. Problems are still
  known to occur for very large or very small values of `Scale`.
* Documentation is now run through ‘continuous integration’ (viz,
  *Travis* for the time being) as well as the test suite.