Filters and redirection added

@access-tag removed from class properties.

Verbose names for Request properties and methods, as well as a magical get function for Request properties.

Routes are stored as Blobs again.

Filters: can now add a single after and before-filter respectively.

Redirection: simple redirects with a kind default HTTP status. Uses base path based on the script name's directory.

Build passes on `>=5.3`.