The Oregon Legislature is back at it today.   Public hearings on bills begin this week as lawmakers return to Salem to get to work. Governor John Kitzhaber outlines his 2011-2013 budget which is expected to show just how harsh a $3-billion deficit can be on public schools and social services. On the committee agendas are hearings on bills that would increase the fine for driving under the influence, create a new statewide provision for bike-only traffic signals, shore up rules related to raising chickens at home. But the top priority is the State budget shortfall and job growth;  the unemployment rate hovering near 10.5% for more than a year.