Dealing with Templates within Tags

[k----n]

To reproduce use: https://en.wikipedia.org/w/index.php?title=Ia_Ora_'O_Tahiti_Nui

<poem>{{lang|ty|ʻUa rahu te atua i tōʻu ʻāiʻa Hono noʻanoʻa o te motu rau Heihei i te pua riʻi au ē E firi nape mōrohi ʻore ʻO tāʻu īa e faʻateniteni nei Tē tūoro nei te reo here O te huia ʻA hiʻi i tō aroha ʻIa ora ʻo Tahiti Nui ē}}</poem>

The node is identified as a tag and when the contents are taken the template is incorrectly identified.

The algorithm should be reworked for _read_part in the Field class (recursion?).

[bcicen]

pushed 4bb3ce7 to allow all nodes (including nested templates) to be discovered on read

[k----n]

Cannot work for some tables. To reproduce try the article 'Ab-Soul discography'.

More checking must be done.

t = import_tables('Ab-Soul discography')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "wikitables/__init__.py", line 23, in import_tables
    return list(_table_gen())
  File "wikitables/__init__.py", line 21, in _table_gen
    yield WikiTable(name, table)
  File "wikitables/models.py", line 127, in __init__
    self._read(raw_table)
  File "wikitables/models.py", line 160, in _read
    row = Row(self._head, tr)
  File "wikitables/models.py", line 96, in __init__
    super(Row, self).__init__(self._read(head, self.raw))
  File "wikitables/models.py", line 111, in _read
    return zip(head, [ Field(c) for c in cols ])
  File "wikitables/models.py", line 22, in __init__
    self.value = self._read(self.raw)
  File "wikitables/models.py", line 43, in _read
    joined = ' '.join(list(_read_parts(node)))
  File "wikitables/models.py", line 37, in _read_parts
    for x in _read_parts(subnode):
  File "wikitables/models.py", line 36, in _read_parts
    for subnode in n.contents.nodes:
AttributeError: 'NoneType' object has no attribute 'nodes'