add version on vraptor-site docs

[Turini]

[angeliski]

Do you like to see the version below the Download button, above the vraptor 3 link? It's only put the last version found in https://github.com/caelum/vraptor4/releases (now is v4.2.0-RC3).

[Turini]

not really. I'd like to provide different doc pages for different versions of the fw.
Currently it's not clear that some feature works only since version X

[angeliski]

Sorry, @Turini , but I can't understand your idea. You can provide one example?

[Turini]

i mean something like this:

this is a print from play framework's website. You can see the version number at the URL as well
https://www.playframework.com/documentation/2.5.x/Tutorials

[angeliski]

Nice! I will try think about one solution for that.