Merge pull request #607 from bocoup/envs

...age/expressions/arrow-function/scope-body-lex-distinct.js

.../expressions/arrow-function/scope-param-elem-var-close.js

...e/expressions/arrow-function/scope-param-elem-var-open.js

...essions/arrow-function/scope-param-rest-elem-var-close.js

...ressions/arrow-function/scope-param-rest-elem-var-open.js

.../expressions/arrow-function/scope-paramsbody-var-close.js

...e/expressions/arrow-function/scope-paramsbody-var-open.js

test/language/expressions/call/scope-lex-close.js

test/language/expressions/call/scope-lex-open.js

test/language/expressions/call/scope-var-close.js

test/language/expressions/call/scope-var-open.js

.../expressions/class/scope-gen-meth-paramsbody-var-close.js

...e/expressions/class/scope-gen-meth-paramsbody-var-open.js

...uage/expressions/class/scope-meth-paramsbody-var-close.js

...guage/expressions/class/scope-meth-paramsbody-var-open.js

test/language/expressions/class/scope-name-lex-close.js

...anguage/expressions/class/scope-name-lex-open-heritage.js

...uage/expressions/class/scope-name-lex-open-no-heritage.js

...ge/expressions/class/scope-setter-paramsbody-var-close.js

...age/expressions/class/scope-setter-paramsbody-var-open.js