v2.3.0

refactored to use file name tokenizer.
added option (-f) to remove filename suffix.
default to relative file name.
some other minor refactoring.

v1.1.2

refactoring, dependency change and bugfix:

    added timestamp option.
    some improvements.
    refactoring into more modules.
    bugfix in -r -a
    remove git dep. use git from cmd.

v0.1.1

add top_level attr