PrPixel: Introduce the LHCb::Pr::Velo namespace
- put the various algorithms in PrPixel into the LHCb::Pr::Velo namespace, dropping any leading 'Pr' and 'Velo' from their names
- drop some explicit LHCb:: prefixes to types, as they are now found by ADL in the enclosing namespace
- use DECLARE_COMPONENT_WITH_ID to avoid (at this time) changing the way the algorithms types are known in python
Edited by Marco Cattaneo