[Feature Request] Add support for html line breaks.

[hXtreme]

I was using mdv to view the README file for redisson where I noticed that mdv doesn't correctly handle <br\> line break.

Expected Output:

Redisson - Redis Java client
with features of In-Memory Data Grid

Actual Output:

Redisson - Redis Java client <with features of In-Memory Data Grid

[dealmeidavf]

Same here. This Markdown test.md

Hello
\
World

renders as (mdv test.md)

Hello
\
World

GitHub renders it as:

Hello

World