expr: start new broadcast operator
expr: broadcast scalar_symbols function
expr: broadcast user function
expr: broadcast test tabular case
expr: unaryop is elemwise
expr: math is elemwise
expr: functions.py no longer uses broadcast
expr: remove old broadcast from expr
pandas: compute(Field, Series)
sql: use ColumnElement
expr: binop._inputs only includes exprs
expr: broadcast_collection function
expr: fix arithmetic inputs test
expr: broadcast_collect subs correctly
python: print_python code printing function
expr: broadcast_collect doesn't suck up scalars
expr: pretty label __str__
expr: pretty reduction printing
fix imports
print_python datetime handling