Distribution rename, bug fixes, cosmetics

* Rename distribution to Video::Subtitle::Simple
    This clarifies the purpose of the distribution instead of
    being vague with "OO", which presumably most subtitle
    distributions will be object-oriented
* Move Video::Subtitle::Time to Video::Subtitle::Simple::Time
    This module is too simple to be the default subtitle time
    module as it does not take into account many things that
    are relevant to subtitles such as fps, etc.
* (Bug) Fix erroneous uses of "second" with "as_seconds"
    Previously, the time module used the accessor "second"
    to return the representation of the time in seconds. Now
    seconds only returns the second component of the time and
    the proper method is "as_seconds". This meant that calls
    to "get_subtitles" would return subtitles sorted by their
    second component, so times like "0:01:01" would sort before
    "0:00:30". Other similar errors have been corrected
* Remove todo and add tests to catch above error of using
"second" instead of "as_seconds"
* (Bug) Require specifiying encoding in bin scripts
    The encoding now defaults to utf-8 with options to
    change it.
* Add Readme to root of distribution
    This makes Github happy
* Fix newlines in dist.ini
* Run perltidy over distribution
Remove commented out coercion code

They turned out to not be necessary