Add ASCII Table Writer for output

[t2y]

Currently, there is no choice to customize the output (result).

target:
SELECT COUNT(id) FROM trial

basic (msec):
 - min    : 166.037
 - max    : 3768.686
 - mean   : 1379.336
 - median : 1058.436
 - stddevp: 980.616
 - stddevs: 990.572

percentiles (msec):
 - p99: 3748.029
 - p95: 3635.364
 - p90: 3544.550
 - p80: 1967.151
 - p70: 1570.149

It might be useful to be able to output the markdown table format. tablewriter looks good to me.