Adds TODO, FIX minor issue in list, change explicit call to class name

to cla.

TODO

@@ -0,0 +1,11 @@
+TODO list
+=========
+- manage cross-references
++ labels
+- find (authors) duplicates
++ remove command
+- stats command
+- add query support to list command (cf beets)
+- FIX open on ubuntu
+- implement queries
+- edit on add

papers/commands/list_cmd.py

@@ -16,6 +16,6 @@ def command(config, ui):
             num=int(n),
             citekey=ui.colored(rp.citekeys[n], 'purple'),
             descr=bibdesc,
-            labels=ui.colored(''.join(p.metadata['labels']), 'purple'),
+            labels=ui.colored(''.join(p.metadata.get('labels', [])), 'purple'),
             )).encode('utf-8'))
     ui.print_('\n'.join(articles))

papers/paper.py

@@ -277,13 +277,10 @@ class PaperInRepo(Paper):
     def load(cls, repo, bibpath, metapath=None):
         key, entry = get_bibentry_from_file(bibpath)
         metadata = get_safe_metadata_from_path(metapath)
-        p = PaperInRepo(repo, bibentry=entry, metadata=metadata,
+        p = cls(repo, bibentry=entry, metadata=metadata, citekey=key)
-                                 citekey=key)
         return p
 
     @classmethod
     def from_paper(cls, paper, repo):
-        return PaperInRepo(repo,
+        return cls(repo, bibentry=paper.bibentry, metadata=paper.metadata,
-                           bibentry=paper.bibentry,
-                           metadata=paper.metadata,
                    citekey=paper.citekey)