finish method polling with hash or address type argument values

collected from watched events; 'MissingMethodsCheckedEventsIntersection'
method to find headers which have been checked for each event of
interest but methods have not yet been polled at that header; tests for
new features; travis ci go version 1.9 -> 1.11 ; consolidate omniWatcher and lightOmniWatcher into single command with light as default

cmd/root.go

@@ -42,14 +42,6 @@ var (
 	startingBlockNumber int64
 	syncAll             bool
 	endingBlockNumber   int64
-	network             string
-	contractAddress     string
-	contractAddresses   []string
-	contractEvents      []string
-	contractMethods     []string
-	eventArgs           []string
-	methodArgs          []string
-	createAddrList      bool
 )
 
 var rootCmd = &cobra.Command{