add 'deprecated' field to release type

[mickeyn]

can be taken from the meta, let's add it to the release result as a query-able field

It should also look at the POD name attribute and look for DEPRECIATED or DEPRECATED (case sensitive)

[oalders]

I think we should add this field to modules as well.

[oalders]

See also metacpan/metacpan-web#1435

[mickeyn]

This is now done, both file and release types have a deprecated field.