Specify release title

[volodya-lombrozo]

As far as I know, when Rultor creates a release, the release has a name of the last commit, for example like:

• here
• or here

It's not so beautiful and I have to search for the tag that was attached to that release, I believe it would be better to give more meaningful name to a release, for example:

• "Version 1.6.4"
• Or just "1.6.4"

Also we can allow to pass the custom release name in rultor command:

@rultor please, release, tag is '0.1.2' and title 'Awesome Version 0.1.2'

[volodya-lombrozo]

@yegor256 What do you think?

[yegor256]

@volodya-lombrozo I like this one:

@rultor release tag is `0.0.0` and title is `hello, world`

[volodya-lombrozo]

@yegor256 What about the default behaviour? Do you want to leave it as is (== "the last commit message")?

[yegor256]

@volodya-lombrozo yes, it would be most logical, since there could be users who expect this behavior