add models that will hold value for rx call

Author: Ebenezer Ackon

app/src/main/java/jfyg/etherscan/helloetherescan/model/BaseModel.kt

@@ -0,0 +1,7 @@
+package jfyg.etherscan.helloetherescan.model
+
+open class BaseModel {
+    var status: String? = ""
+    var message: String? = ""
+
+}

app/src/main/java/jfyg/etherscan/helloetherescan/model/EtherPriceModel.kt

@@ -0,0 +1,9 @@
+package jfyg.etherscan.helloetherescan.model
+
+class EtherPriceModel : BaseModel() {
+    var ethBtc: String? = ""
+    var ethBtcTimestamp: String? = ""
+    var ethUsd: String? = ""
+    var ethUsdTimestamp: String? = ""
+    
+}