init v3.3.3
fix version
install conf in the effective user area for sudo install
expose conf file
add README to contrib
add README to contrib (fmt)
update docs
add writable and uxchown
add new github video
update CHANGES.txt (close #61)
add writable and uxchown (close #62)
Improve docs on 'isbntools as a lib' (close #63)
typo
add uxchmod
fix creation cache code
fix test for membership
fix DEFAULT_CACHE logic
fix 'system install'
write mode666 for py2 and py3
add LIB