Updated doc for 0.2.0

Merge branch 'preview'

Merge branch 'toggle-windows'

Bumped version to 0.0.8

New features for 0.0.7

- '{' and '}' added to jump to next file grouping
- ':Keep' added
- ':Reject' added
- ':Find' is on its way to deprecation

:Doline and :Dofile aliased to built-in :cdo, :ldo, :cfdo and :lfdo w…

…hen applicable.

Massive refactoring of the whole filter/restore mechanism.

release 0.0.3

Bumped version number