ARROW-1028: [Python] Fix IPC docs per API changes
ARROW-1028: [Python] Fix IPC docs per API changes

Author: Wes McKinney <wes.mckinney@twosigma.com>

Closes #687 from wesm/python-update-ipc-docs and squashes the following commits:

a502abe [Wes McKinney] Fix IPC docs per API changes

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