Implement micro-httpd for providing webcontrol and streams
1. Add tls support for webcontrol and streams. aka ssl/tls, https
2. Add functionality to provide streams on single port
3. Add functionality for additional authentication methods of webcontrol.
4. Add functionality for providing static images
5. Update documentation for new functionality.
6. Resolve issue with stream_preview_newline
7. Add functionality for specifying camera in webcontrol and streams via camera_id
8. Depreciated functionality to specify substream via port
9. Add functionality to specify substream via a URL
10. Revise `quit` to only be available via text (programmatic) interface
11. Added functionality for CORS header on webcontrol interface
Closes#526Closes#661Closes#709Closes#737Closes#750
1. Change from htmlpreview to rawgit.
2. In guide have top menu always point to home page.
3. Include the home page in the usage notice.
4. Reference home page guide as preferred default
5. Update changelog with revisions since 4.1.1
