Log Message:
Update to FriCAS 1.0.6

Notable changes (compared to 1.0.5 version) include:

- the axiom script is no longer installed (use fricas script instead)
- some undesirable simplification are no longer done by default,
  for example now asin(sin(3)) is left unevaluated
- support lambda expressions using '+->' syntax and nested functions
  in Spad
- better configure, support for Dragonfly BSD
- faster bootstrap, also parallel (this does not affect speed
  of release build)

Several bug fixes, in particular:

- fixed a regression introduced in 1.0.4 which caused equality
  for nested products to sometimes give wrong result
- corrected fixed output of floating point numbers,
- operations on differential operators like symmetric power work now
- fixed crashes related to coercing power series
- functions returning Void can be traced