require: add missing blacklistTests, implement opts.whitelist and opts.only - closes #125

Conflicts:
	lib/6to5/register.js
v1.10.11
clarify default ignore in 6to5/register
register: fix ignoreRegex compatibility check
v1.10.12
Merge branch 'master' into experimental

Conflicts:
	README.md
	lib/6to5/register.js
support SpreadElement in destructuring - fixes #128
add basic generation tests
add modules ignore tests
add Statement node type
simplify ast transformer code
fix pointless newlines after left braces
remove duplicate mutator map test