fix a couple docstring typos
remove automatic version generation

Adds too much complexity, especially when it is set manually in the
changelog anyway.
fix unworking -s and -r flags

suppress_no_delim_lines and supress_preheader_lines did not get wired up
correctly. This commit fixes that and moves these functions to the core,
where they operates on the already-parsed lines instead of decorating
io.get_lines.
bump version to 0.3.2