[SCM-487] support --parents option for svn copy (tag commands) (svn 1.5
required)

-- Reapplied Olivier's patch
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/maven-scm

# By Kristian Rosenvold
# Via Kristian Rosenvold
* 'master' of https://git-wip-us.apache.org/repos/asf/maven-scm:
  Added .gitattributes to enforce proper line endings, remaining incorrect files fixed.