ARROW-1356: [Website] Add new committers
ARROW-1356: [Website] Add new committers

Author: Kouhei Sutou <kou@clear-code.com>

Closes #968 from kou/add-new-committers and squashes the following commits:

710558b [Kouhei Sutou] [Website] Add new committers

tebeka/arrow,NonVolatileComputing/arrow,apache/arrow,icexelloss/arrow,NonVolatileComputing/arrow,wesm/arrow,yufeldman/arrow,apache/arrow,itaiin/arrow,itaiin/arrow,xhochy/arrow,apache/arrow,majetideepak/arrow,siddharthteotia/arrow,wagavulin/arrow,xhochy/arrow,laurentgo/arrow,dremio/arrow,cpcloud/arrow,yufeldman/arrow,pcmoritz/arrow,xhochy/arrow,wesm/arrow,apache/arrow,yufeldman/arrow,cpcloud/arrow,cpcloud/arrow,kou/arrow,NonVolatileComputing/arrow,majetideepak/arrow,itaiin/arrow,icexelloss/arrow,itaiin/arrow,pcmoritz/arrow,yufeldman/arrow,wesm/arrow,yufeldman/arrow,kou/arrow,kou/arrow,kou/arrow,renesugar/arrow,siddharthteotia/arrow,yufeldman/arrow,majetideepak/arrow,siddharthteotia/arrow,laurentgo/arrow,wesm/arrow,pcmoritz/arrow,wagavulin/arrow,majetideepak/arrow,renesugar/arrow,wagavulin/arrow,apache/arrow,dremio/arrow,siddharthteotia/arrow,itaiin/arrow,dremio/arrow,laurentgo/arrow,pcmoritz/arrow,siddharthteotia/arrow,tebeka/arrow,tebeka/arrow,apache/arrow,NonVolatileComputing/arrow,NonVolatileComputing/arrow,itaiin/arrow,pcmoritz/arrow,icexelloss/arrow,wagavulin/arrow,majetideepak/arrow,kou/arrow,dremio/arrow,cpcloud/arrow,dremio/arrow,cpcloud/arrow,renesugar/arrow,itaiin/arrow,renesugar/arrow,wesm/arrow,NonVolatileComputing/arrow,dremio/arrow,tebeka/arrow,majetideepak/arrow,cpcloud/arrow,wesm/arrow,yufeldman/arrow,renesugar/arrow,xhochy/arrow,tebeka/arrow,laurentgo/arrow,kou/arrow,apache/arrow,yufeldman/arrow,renesugar/arrow,renesugar/arrow,laurentgo/arrow,itaiin/arrow,kou/arrow,xhochy/arrow,renesugar/arrow,xhochy/arrow,apache/arrow,laurentgo/arrow,dremio/arrow,apache/arrow,wesm/arrow,majetideepak/arrow,wagavulin/arrow,yufeldman/arrow,wagavulin/arrow,majetideepak/arrow,dremio/arrow,cpcloud/arrow,siddharthteotia/arrow,dremio/arrow,majetideepak/arrow,siddharthteotia/arrow,kou/arrow,pcmoritz/arrow,laurentgo/arrow,laurentgo/arrow,itaiin/arrow,renesugar/arrow,kou/arrow,majetideepak/arrow,pcmoritz/arrow,majetideepak/arrow,tebeka/arrow,wagavulin/arrow,laurentgo/arrow,tebeka/arrow,NonVolatileComputing/arrow,itaiin/arrow,tebeka/arrow,wesm/arrow,renesugar/arrow,renesugar/arrow,itaiin/arrow,wagavulin/arrow,xhochy/arrow,majetideepak/arrow,wagavulin/arrow,icexelloss/arrow,laurentgo/arrow,wagavulin/arrow,yufeldman/arrow,xhochy/arrow,wesm/arrow,icexelloss/arrow,kou/arrow,siddharthteotia/arrow,wesm/arrow,renesugar/arrow,renesugar/arrow,NonVolatileComputing/arrow,xhochy/arrow,yufeldman/arrow,wesm/arrow,kou/arrow,cpcloud/arrow,laurentgo/arrow,NonVolatileComputing/arrow,NonVolatileComputing/arrow,renesugar/arrow,wesm/arrow,pcmoritz/arrow,pcmoritz/arrow,renesugar/arrow,icexelloss/arrow,wagavulin/arrow,icexelloss/arrow,siddharthteotia/arrow,apache/arrow,pcmoritz/arrow,itaiin/arrow,tebeka/arrow,icexelloss/arrow,pcmoritz/arrow,laurentgo/arrow,cpcloud/arrow,icexelloss/arrow,itaiin/arrow,cpcloud/arrow,majetideepak/arrow,itaiin/arrow,pcmoritz/arrow,wesm/arrow,apache/arrow,cpcloud/arrow,kou/arrow,xhochy/arrow,itaiin/arrow,xhochy/arrow,dremio/arrow,pcmoritz/arrow,xhochy/arrow,NonVolatileComputing/arrow,xhochy/arrow,apache/arrow,apache/arrow,icexelloss/arrow,xhochy/arrow,cpcloud/arrow,dremio/arrow,majetideepak/arrow,icexelloss/arrow,wagavulin/arrow,apache/arrow,tebeka/arrow,icexelloss/arrow,wesm/arrow,laurentgo/arrow,pcmoritz/arrow,xhochy/arrow,majetideepak/arrow,icexelloss/arrow,kou/arrow,laurentgo/arrow,siddharthteotia/arrow,icexelloss/arrow,kou/arrow,pcmoritz/arrow,cpcloud/arrow,siddharthteotia/arrow,laurentgo/arrow,cpcloud/arrow