Fix use of translation function
To avoid stomping on the global `$post` variable, better to use `get_the_ID()` as a wrapper function
Add missing use of translation function
Don't need to use `sprintf()` here, as only a substr needs to be translatable
Coding standards
Clean up the rendering of the byline string
Fix rendering of an individual author in `largo_byline()`

Adds proper escaping, correctly uses a translation function, and supports the proper author link, regardless of permalink structure.
Merge pull request #206 from INN/fix-largo-byline

Fixes to largo_byline()