Remove pubsub and replace w/ polling head of chain (#122)

* Rename geth package structs to not be prefaced with package name

* No longer need to dump schema since Travis uses migrate

* Rearrange history package

* Removed double request for receipt from block rewards

* Remove Listener + Observers and Replace w/ Polling Head

* Potential Short term Issue w/ Infura (ignore these tests for now)

Gododir/main.go

@@ -77,9 +77,7 @@ func tasks(p *do.Project) {
 		cfg := cmd.LoadConfig(environment)
 		connectString := config.DbConnectionString(cfg.Database)
 		migrate := fmt.Sprintf("migrate -database '%s' -path ./db/migrations up", connectString)
-		dumpSchema := fmt.Sprintf("pg_dump -O -s %s > ./db/schema.sql", cfg.Database.Name)
 		context.Bash(migrate)
-		context.Bash(dumpSchema)
 	})
 
 	p.Task("rollback", nil, func(context *do.Context) {
@@ -87,9 +85,7 @@ func tasks(p *do.Project) {
 		cfg := cmd.LoadConfig(environment)
 		connectString := config.DbConnectionString(cfg.Database)
 		migrate := fmt.Sprintf("migrate -database '%s' -path ./db/migrations down 1", connectString)
-		dumpSchema := fmt.Sprintf("pg_dump -O -s %s > ./db/schema.sql", cfg.Database.Name)
 		context.Bash(migrate)
-		context.Bash(dumpSchema)
 	})
 
 	p.Task("showContractSummary", nil, func(context *do.Context) {