Add Snowflake connector documentation - #220

Changed pages include:

• index.html - view
• 404.html - view
• appendix/index.html - view
• case-practices/index.html - view
• connectors/index.html - view
• data-replication/index.html - view
• data-transformation/index.html - view
• experimental/index.html - view
• faq/index.html - view
• getting-started/index.html - view

There are more changes not included in the list