[maven-release-plugin] copy for tag commonmark-parent-0.8.0

remove wiki submodule

removing workspace from vcs

fix vsch#10

[maven-release-plugin] copy for tag commonmark-parent-0.7.1

update wiki

[maven-release-plugin] copy for tag commonmark-parent-0.7.0

update first maven central release

fix vsch#8

refine source position attribute generation