Changes:

• ctags 6.1.0
• Tmain: run early--version-opt-processing.d in BUILDDIR
• Merge pull request #3900 from masatake/news--update
• Merge pull request #3902 from masatake/subtrees--pull-in
• Merge pull request #3901 from masatake/readtags--with-pseudo-tags
• Merge pull request #3899 from masatake/I18NRubyGem-add-locale-kind
• Merge pull request #3898 from masatake/ruby--class-new
• Merge pull request #3897 from masatake/xrc