add intro to nosetests
fmt bibtex
update ranges data
add cwdfiles
extended `get_canonical_isbn`
ren file -> files
strong tests for `files`
add `chop_tokens`
ren `chop_tokens` -> `cutoff_tokens`
add conf section MISC
add test for `cutoff_tokens`
add missing quotes
add conf MISC editing
delete extra space
`isbn_meta`with fuzzy matching
`isbn_goom` with fuzzy matching (close #48)