Big update! Version 2

• Now with optional permissions. By default only asks for GitHub permission. Rest can be added on demand (Check your URL/Tool bar for a blue RMCO icon on supported sites).
• Added optional support for:
  • Xahlee (http://xahlee.info/php/list_basics.html)
  • Learn To Solve It (http://www.learntosolveit.com/ruby/forloop.html)
  • Tutorials Point (https://www.tutorialspoint.com/python3/python_basic_syntax.htm)