Change ChangeLog file to ReleaseNote file

@yoshfuji san says this ChangeLog file is not change log, it is release note.
So I try to change ChangeLog file to ReleaseNote file.
And I add author name of the version. (Only version 14.03 and 14.06...)

If the file has no problem, please merge this.
It seem a little redundant. And I want to acknowledge it politely.
My suggestion is.
Contributors to this release. Thank you very much.