Implement quick reply (line#120)

* Implement quick reply

* Polish

Release 1.7.2

Release 1.7.1

Release 1.7.0 (line#108)

Release 1.5.0 (line#66)

release 1.4.0 (line#63)

1.2.0 release

fix readme

Merge pull request line#14 from line/release-1.0.2

Release 1.0.2

Merge pull request line#12 from line/release-1.0.1

Update version to 1.0.1