v0.4.0-alpha

Fixes a bug where a line starting with elipsis (...) is incorrectly parsed as a Heading.

Also introduces a is_forced' bool to the FNLine` struct. This bool will be true for lines which are "forced" formatting, i.e. use special character(s) to override their line types.

!CRASH!
The car crumples like an accordion.

using ! to prefix a line will force it to be action, for example.

It is useful to know which lines are "forced", so that these extra characters can be cleaned up from the string content before paginating / rendering.

CRASH!
The car crumples like an accordion.