RLS: VERSION.txt: 0.6.3
Merge branch 'release/0.6.3'

* release/0.6.3:
  RLS: VERSION.txt: 0.6.3
  DOC: links.html: github source link
  DOC: README.rst links
Merge tag 'v0.6.3' into develop

RLS: dotfiles v0.6.3

* tag 'v0.6.3':
  RLS: VERSION.txt: 0.6.3