* doc/NEWS-2.2.0: moved from NEWS
* doc/ChangeLog-2.2.0: moved ChangeLog older than created ruby_2_2 branch
* NEWS: NEWS for 2.3.0 that describes changes since 2.2.0
* ChangeLog: ChangeLog since branch point of ruby_2_2 branch
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49008 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
