v0.0.2-alpha

• Update version
• Update README.md
• Add Runtime::setStartExtender() to add extra initialition before compile an script. Remove write() and print() functions.
• Remove warning about getValue of base object.
• Fix getValue over a simple value break execution.
• Fix object declaration in JS::defineObject
• Detect and ignore empty if or else code blocks. Fix c_nop code block to emit '{}' instead ''.