basic template for location@type=nested
add full stop at end of nested location bullet
get 'contains' working with new 'nested' location types
use 'Within' for the initial text in nested locations
add footnote references to nested location entries
add standard comment header for nested locations template
new run with latest places and nested location handling code; fixes #24, fixes #30, fixes #52
Merge pull request #59 from srophe/issue30

Issue30: implement nested locations