ARROW-1215: [Python] Generate documentation for class members in API Reference
ARROW-1215: [Python] Generate documentation for class members in API Reference

Author: Philipp Moritz <pcmoritz@gmail.com>

Closes #840 from pcmoritz/pyarrow-doc-members and squashes the following commits:

b09f9df1 [Philipp Moritz] generate documentation for class members in API Reference

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