Refactor into modules

Complete refactor:

• Create flags.Set object with all flags and appropriate access methods.
• Move everything but main.go into appropriate packages.
• Create "classes" initialized with what used to be global data in these new packages.
• main.go now has local variables instead of global which are passed to instantiated class objects.
• Some testing, everything seems to work OK.

Cleanup

• Add garbage collection for methodByID and paramsByID in messages.go.
• Add -logLevel flag.
• Move some global variables to the files that define and/or mostly use them.
• Remove TODO to replace time.Sleep() at end of main() as it has already been successfully replaced.

Closer to release

• Updated README.md
• Separate and parallel console and file logging
• Support for four identical logging formats for each
• Web console for interactive changes

Update README

v0.2.1

Update README with -simple mode and up-to-date log examples

Usability updates

• Added ability for server to handle multiple client attachments in sequence (may work in parallel as well).
• Add -simple flag to show much simpler message traffic without detail data.

Cleanup logging

• Get more data in simple mode
• Streamline direction symbology
• Remove "who did this" field
• Make ID $ID so it will show early

Seems to work

Needs doc