Merge branch 'master' into master

Author: serranoarevalo

README.md

@@ -7,4 +7,33 @@ Practicing Git & Github for collaboration.
 Add your Github username below:
 
 - [x] serranoarevalo!
-- [x] kd!
+- [x] kd!
+- [x] kangdongil
+- [x] dkssyddico
+- [x] confidential-nt
+- [x] Yangseungchan
+- [x] supermonkey
+- [x] eunoialim
+- [x] ystime25
+- [x] LEE Seungje
+- [x] rhaehf
+- [x] jkayk
+- [x] river
+- [x] junhyung!
+- [x] cws0316
+- [x] gzero1728
+- [x] jiun-Kim (I love learn coding from Nomadcoder)
+- [x] hs04111
+- [x] sun!
+- [x] presuit!
+- [x] saintluxpgw!
+- [x] T-WK! hello!
+- [x] cicada
+- [x] sungeun101
+- [x] seunga 
+- [x] RtgKorea
+- [x] Johny Kim! 2019. 8. 9
+- [x] aikasi
+- [x] GalaxySailor!
+- [x] yuyaebean
+- [x] nanmadol