removed the now-null middle name field for Wasserman Schultz, rather than it being blank
update our YAML dumper to use tildes for nulls, so our one tilde doesnt get changed on output from a script
remove trailing space(?)
update README to mention vice presidents
update House contact info (some ZIP+4s changed)
update Senate contact info
updating committees-historical (mostly just indicating some committees present in 113th Congress, but also THOMAS made some name corrections)
updating current Senate committees and assignments
updating House member website URLs