Refactoring of Obfuscator class

Types refactoring

Fixed processing of `null` value in NodeUtils.clone() method

Fixed require of external user config file javascript-obfuscator#2

Merge remote-tracking branch 'origin/master'

0.10.0 release

Merge branch 'dev'

0.10.0-beta.11 `disableConsoleOutput` option now disabled by default

0.10.0-beta.10 Fixed runtime errors

Added ability to add specific node guard to the black list of nodes.

This nodes wont obfuscated.