make meta data of sitemap entry available in response meta-data
fixed a wrong variable name
removed tailing blank lines
added documentation for accessing additional sitemap data in the
spider's response.meta dictionary
test parsing of sitemap with and without alternative links
loop over all links in the current sitemap entry
rename xml_to_dict to element_to_dict to make the limited scope of this
function more obvious
every sitemap entry is put in a list for handling of non-unique tags
fix regarding values in list
adjusted docs for lists in meta dict
Merge branch 'info_from_sitemap' of https://github.com/chrisboo/scrapy into 0.22