Ability to set version for all blocks

[AntonKrechetov]

Hi,

I'd like to be able to set api version for all blocks in the documentation. Probably the blocks by default should have the version number from apidoc.json instead of 0.0.0. Currently apidoc seems to expect developers to manually update versions in all blocks of all files on each version release, even if nothing has changed in most of specific blocks.
Alternatively, maybe use syntax like @apiVersion %CURRENT%.

[AntonKrechetov]

Related issue: #522