[btcsuite/btcd] 379383: docs: Update READMEs with current details.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 37938375dc5a5f9f50b38aa0ce90a6dbf4de61f2
      
https://github.com/btcsuite/btcd/commit/37938375dc5a5f9f50b38aa0ce90a6dbf4de61f2
  Author: Dave Collins <da...@conformal.com>
  Date:   2016-03-11 (Fri, 11 Mar 2016)

  Changed paths:
    M README.md
    M docs/README.md

  Log Message:
  -----------
  docs: Update READMEs with current details.

This commit updates the main README.md and docs/README.md files to
replace the references to the now dead btcgui project with the
Windows-only Paymetheus project.

While here, it also updates some information to make it more current and
accurately describe the current status.