Add Client methods

[TomAugspurger]

• load (ENH: Added load_table #38)
• load_binary
• get_tables (Table details #37)
• get_table_details (Table details #37)

[TomAugspurger]

Looks like load_table_binary may be something like:

binary_rows = []

for i in range(100):
    row = TRow([
        TDatum(TDatumVal(int_val=i)),
        TDatum(TDatumVal(real_val=float(i))),
        TDatum(TDatumVal(str_val=str(i)))
    ])
    binary_rows.append(row)
c.load_table_binary(s, 'baz', binary_rows)

[TomAugspurger]

This was closed by #53