Replace placeholder information

[Arthelon]

Here is a list of placeholder items that need to be updated on the site before deploy:

• anchor tag URLs in Resources section, Navbar, and Footer
  • Remove "Demo Projects", "Tutorials"
  • Copy skygear.io: Terms of Services, Our Promises, Acceptable Use Policy, Data Privacy Policy, Service Level Agreement, Security
  • Use same link for other external links
• code samples
• Pricing FAQ answers
• meta tag content