Support related amendments, fix some related bill reason parsing
Support related amendments, fix some related bill reason parsing

chriscondon/billtext,sunlightlabs/congress-opencongress,unitedstates/congress,boblannon/congress,Nolawee/congress,Nolawee/congress,sunlightlabs/congress-opencongress,chriscondon/billtext,unitedstates/congress,boblannon/congress