Adds consistency to existing samples for users, connectors, etc., as
well as protects users from accidental changes to files under Git, which
is why there are samples after all.
- Be more explicit with exact instructions to startup
- Change some of the commands that were using local directory with "./" when
the executable was in a lower directory. These
commands (like "./bin/dex-worker") did not work on ZSH or Bash, so I
removed the leading "./"
- Add some syntax highlighting markdown to code sections
