ARROW-2279: [Python] Better error message if lib cannot be found
ARROW-2279: [Python] Better error message if lib cannot be found

Change-Id: I82e6b51fa5129473815e19fd6d03bdaaef7a88ff

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