"Add corresponding author field to template"

Closes #32 (closed)

This merge contains both, adding the asterisk to author name and also adding a corresponding author field to metadata. An additional column has to be filled in authors.tex for corresponding author details.

Note : The orcid ID field seems to be mandatory

metadata/authors.tex

 %
 %
-% Add Information for authors and the respective affiliations 
-% The data format follows loosely the JATS specifications.  
+% Add Information for authors and the respective affiliations
+% The data format follows loosely the JATS specifications.
 %
 % The content of this file will be omitted for reviewing.
 % For submission, no anonymization is necessary
 %
 
 % \author{                                  % One entry for each author
-%   orcid = 0000-0000-0000-0000,            % 
-%   surname = Lastname,                     % 
-%   given-names = First Second,             % 
-%   affiliation = someid,                   % An affiliation with the same ID must be given 
-%   email = email.address@somedomain.edu    %
-%   contribution = Conceptualization        % Multiple terms following the CrediT specifications 
-%                                           % can be made: https://credit.niso.org 
+%   orcid = 0000-0000-0000-0000,            %
+%   surname = Lastname,                     %
+%   given-names = First Second,             %
+%   affiliation = someid,                   % An affiliation with the same ID must be given
+%   email = email.address@somedomain.edu,    %
+%   corresponding = True                      % set to True if corresponding author, else comment out
+%   contribution = Conceptualization        % Multiple terms following the CrediT specifications
+%                                           % can be made: https://credit.niso.org
 % }
 %
 % \affiliation{
@@ -26,42 +27,47 @@
 %
 %
 
-\author{                      
+
+
+\author{
+  surname = Esempio,
+  given-names = Ben,
+  orcid = 0000-0000-0000-0002,
+  affiliation = su,
+  email = ben.esempio@someuniversity.edu,
+  corresponding = True % set to True if corresponding author, else comment out
+  %  contribution = {Formal Analysis, Writing – review \& editing}
+}
+
+\author{
   orcid = 0000-0000-0000-0001,
   surname = Musterfrau,
   given-names = Marie,
-  affiliation = su,        
+  affiliation = su,
   email = marie.musterfrau@someuniversity.edu,
+  % corresponding = True % set to True if corresponding author, else comment out
   contribution = {Conceptualization, Writing – original draft}
 }
 
-\author{                       
-%  orcid = 0000-0000-0000-0002,
-  surname = Esempio,
-  given-names = Ben,
-  affiliation = su,         
-  email = ben.esempiosomeuniversity.edu,
-%  contribution = {Formal Analysis, Writing – review \& editing}
-}
-
 \affiliation{
-  id = su,                  
+  id = su,
   department = Institute for curious research,
   organization = Some University,
   city = Somecity
 }
 
-\author{                        
+\author{
   orcid = 0000-0000-0000-0003,
   surname = Example,
   given-names = Eric,
-  affiliation = au,          
+  affiliation = au,
   email = eric.example@anotheruni.edu,
+  %  corresponding = True % set to True if corresponding author, else comment out
   contribution = {Methodology, Project administration}
 }
 
 \affiliation{
-  id = au,                 
+  id = au,
   department = Super Department,
   organization = Another University,
   city = Anotherville