document_test.py: Fixes wrong class tested for test_sitemap_detect
string_test.py: Adds better coverage on tuple and else case.
factory_test.py: Better coverage on Factory container methods.
cache_test.py: Better coverage on LRUCache touch by get vs set.
decompression_test.py: Adds GzipDecompressor test.
app.py: Hooks up the --bind-address option.