add constant replace, indexof
add constant replace, indexof
Merge branch 'master' of github.com:tiliang/CVC4
move new functions under exp options
Add new method --quant-cf for finding conflicts eagerly for quantified formulas.  This module can efficiently determine when there exists a conflict wrt quantified formulas that is implied by the current set of equalities, and reports the single lemma corresponding to the conflict. It does so before resorting to heuristic instantiation.  Clean up the rewriter, other minor cleanup.
Add stats to quantifiers conflict find.  Added option for qcf.  Working on handling non-APPLY_UF terms.
add repalce
Fixes to stats registry
Framework for theory proof generation.  LFSC Proof generation for UF.  Proof-checking work.  Assorted fix-ups related (mostly) to proofs.
Add debugging stuff for proofs.