Refactor plugin layout; add settings; start issues work
Refactor plugin layout; add settings; start issues work

Original commit: elastic/x-pack-elasticsearch@dae4d50d495d018cf489c3f8da4a8aebe8cf62c9

HonzaKral/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,coding0011/elasticsearch,GlenRSmith/elasticsearch,strapdata/elassandra,coding0011/elasticsearch,uschindler/elasticsearch,GlenRSmith/elasticsearch,gingerwizard/elasticsearch,scorpionvicky/elasticsearch,nknize/elasticsearch,nknize/elasticsearch,scorpionvicky/elasticsearch,strapdata/elassandra,gingerwizard/elasticsearch,robin13/elasticsearch,gingerwizard/elasticsearch,gingerwizard/elasticsearch,robin13/elasticsearch,robin13/elasticsearch,HonzaKral/elasticsearch,nknize/elasticsearch,HonzaKral/elasticsearch,gingerwizard/elasticsearch,uschindler/elasticsearch,scorpionvicky/elasticsearch,gfyoung/elasticsearch,strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,gfyoung/elasticsearch,gingerwizard/elasticsearch,gfyoung/elasticsearch,robin13/elasticsearch,coding0011/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,vroyer/elassandra,uschindler/elasticsearch,GlenRSmith/elasticsearch,nknize/elasticsearch,GlenRSmith/elasticsearch,gfyoung/elasticsearch,scorpionvicky/elasticsearch,gfyoung/elasticsearch,coding0011/elasticsearch,uschindler/elasticsearch,HonzaKral/elasticsearch,coding0011/elasticsearch,vroyer/elassandra,nknize/elasticsearch,strapdata/elassandra,uschindler/elasticsearch