Add options --full-saturate-quant and --mbqi=trust.  Other minor changes.
Fix quotes in string constants.
New translation work, support Z3-str-style string constraints.
Minor code clean up in parser.
smt-lib syntax change: str.contain -> str.contains; add some prefix syntax for cvc format
for merging
add a new file
Merge branch 'master' of github.com:tiliang/CVC4