adding support for blocked categories in openrtb; adding support for battr,btyp,bcat
Review `Router::debug...Impl`, Id argument naming.
Merge branch '2013-12-30_router-debug-info_id-naming' of https://github.com/mikebd/rtbkit into mikebd-2013-12-30_router-debug-info_id-naming
Merge branch 'MOPUB' of https://github.com/jsulmont/rtbkit into jsulmont-MOPUB
router: log "passedDynamicFilters" too
OpenRTB keywords are now Utf8Strings
modified parsing of bid request to fit openrtb currency spec (accept USD ISO4217 code)