fix static member expression calls, make classes more spec-compliant
more source map tests
better support for Identifier in ForOfStatement
block binding label throw test
more traverse tests
util.isAbsolute falsy test
unknown transformer in list test
add sourcemap testing support to test helper
remove null supername hack
remove unused formatJSON method, more reliable parse errors
remove jshint max line length
remove traversal and removal of EmptyStatements and add source map testing support
v1.7.16