Typo

[skip ci]
Add ARGV support for the node cli runner
Return nil on missing env vars in stdlib/nodejs
Fix constant lookup syntax

The previous syntax is invalid in MRI, see #548.
Implement an IO#write that relies on IO#write_proc
Don’t assume “this” is the global object
Ensure opal is built first

Even in presence of preloaded files.
Take only the first ARGF as the script to execute
Fix ARGV and NODE_PATH for the nodejs runner