Much of the guidance in rb-site is old, and hasn't been updated in a

long time. Some of the information was slightly out-of-date, or didn't

provide much help in choosing ideal options.
This change improves some of those strings. Namely:


Fixing up some naming/wording (e.g., "memcache" -> "memcached", and

  or "shipped media" -> "shipped static media").


Adding recommendations for web servers and  database/memcached

  locations.


Better explaining the reasons you'd change the static or media URLs,

  for anyone running with --advanced.


Switching from "http" to "https" in examples.


Further preparing some strings for the upcoming port to Console.

Ran through rb-site install --advanced and rb-site upgrade and read

through the new text.