modify domain_check docstring; give it a recursion helper
expose only solveset and domain_check
Merge pull request #9 from smichr/solveset

merge with master
Merge remote-tracking branch 'sympy/master' into solver_refactor

* sympy/master: (263 commits)
  doctest: SKIP for issue 7702
  remove debug statements from compute_cdf
  import wraps for cache function
  Add Ted Dokos to AUTHORS/aboutus/mailmap. Welcome to SymPy!
  move _mexpand to function; give recursive option
  keep quadratic processing if there is only one factor
  Infinity/NegativeInfinity: simplify relational code
  watch out for algebraics with functions (they can be slow)
  roots: Factor expression before using roots_quadratic()
  Assumptions: 7993 test use is not "=="
  ...

Conflicts:
	sympy/sets/tests/test_sets.py
quick