Implemented filter for ws + fixes

* proper 0xhex
* filters fixed
* start of filter manager
* accounts for ws. Closes #246

event/filter/old_filter.go

@@ -2,6 +2,7 @@
 package filter
 
 import (
+	"fmt"
 	"sync"
 
 	"github.com/ethereum/go-ethereum/core"
@@ -78,6 +79,7 @@ out:
 				self.filterMu.RUnlock()
 
 			case state.Messages:
+				fmt.Println("got messages")
 				self.filterMu.RLock()
 				for _, filter := range self.filters {
 					if filter.MessageCallback != nil {