made left margin part of global css
sass task can use full build path output
core: html emitter can take a splat of args for text method
core: add collect_runs and first_in_run? to transformer
article: added div around author block
core: fix banner display problem and emitter behavior on text null
core: changed default left margin from ems to px
core: pulled add_to_style to core transformer
core: html emitter a_ref takes optional attrs parameter
core: author class more tolerant of missing info