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.
> My suggestion is.
> Contributors to this release. Thank you very much.

Your suggestion is sounds good.
I fixed to the sentence at b503ce6 revision.