Implemented filter for ws + fixes

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

websocket/message.go

@@ -3,10 +3,11 @@ package websocket
 import "github.com/ethereum/go-ethereum/ethutil"
 
 type Message struct {
-	Call string        `json:"call"`
-	Args []interface{} `json:"args"`
-	Id   int           `json:"_id"`
-	Data interface{}   `json:"data"`
+	Call  string        `json:"call"`
+	Args  []interface{} `json:"args"`
+	Id    int           `json:"_id"`
+	Data  interface{}   `json:"data"`
+	Event string        `json:"_event"`
 }
 
 func (self *Message) Arguments() *ethutil.Value {