This adds new APIs that deal with the new documentation syntax
provided by Eolian. The old doc comment APIs are considered
deprecated from now on and will be removed.
@feature
Also added API to retrieve value of a variable (forgot about that one)
and made it impossible to create extern constants (doesn't make sense)
as well as made it impossible to give extern globals values.
Nothing parses yet, and no API is exposed. Also, move the remaining instances of file
inside of existing structures to Eolian_Object and parse basename only once.