Plugins may want to insert meddlewares, so this list should be modifiable
at very list (if we don't want to provide helper methods for this, which
seems a tad overkill for now).
This change is required for the upcoming trim_whitespace plugin.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
There is really no reason to provide and enable a meddleware that
does exactly... NOTHING ...by default.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Created a BaseMeddleware which all Meddleware should derive
from. This is not strictly needed, but will greatly help.
The base class has the common __init__ of all the other
Meddlwares and fall backs for all hooks. That way a new
Meddlware only needs to override what it actually wants to
implement.
