Add Javadoc badge with automatic version detection

[valery1707]

No description provided.

[dmarkov]

@valery1707 Thanks for the pull request, let me find a reviewer..

[dmarkov]

@yegor256 review this pls (it's a rather short pull request)

[yegor256]

@rultor merge

[rultor]

@rultor merge

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@yegor256 Done! FYI, the full log is here (took me 3min)

[dmarkov]

@yegor256 Much obliged! I have added 16 mins to your account in payment "000-1f6a9f63", 26 hours and 32 mins spent

review comments (c=1) added as a bonus

+16 to your rating, your total score is +4565

[dmarkov]

@rultor deploy now pls

[rultor]

@rultor deploy now pls

@dmarkov OK, I'll try to deploy now. You can check the progress here

[rultor]

@rultor deploy now pls

@dmarkov Done! FYI, the full log is here (took me 4min)