cast fix for debug print
clang and gcc predef dump targets, fix VALGRIND_WRAP default
add xmldoctest to README
add a bug testcase for regexp quantifier capture handling: captures are not set to undefined when quantifier is rematched
a test case (somewhat overlapping with an existing case) for a known label handling bug: if the label is applied to a block statement, break/continue won't work properly
update test262 status: several bugs have been happily fixed, and all bugs should now have a diagnosis
document array limitations and regexp quantifier over captures
fix atom start offset for noncapture groups (broke regexps like /(?:a)?/); a FIXME note for captures and quantifiers