Added default field parser

app/src/main/java/net/pokeranalytics/android/util/csv/Field.kt

@@ -1,29 +1,40 @@
 package net.pokeranalytics.android.util.csv
 
+import java.text.DateFormat
+import java.text.NumberFormat
 import java.util.*
 
 
 interface AmountField: NumberField {
 
 	override fun parse(value: String) : Double? {
-		return null
+		val formatter = NumberFormat.getCurrencyInstance()
+		return formatter.parse(value).toDouble()
 	}
 
 }
 
 interface NumberField: Field<Double> {
 	val numberFormat: String?
+
+	override fun parse(value: String) : Double? {
+		val formatter = NumberFormat.getInstance()
+		return formatter.parse(value).toDouble()
+	}
 }
 
 interface DateField : Field<Date> {
 	val dateFormat: String?
 
 	override fun parse(value: String) : Date? {
-		return null
+		val formatter = DateFormat.getDateInstance()
+		return formatter.parse(value)
 	}
+
 }
 
 interface BlindField : Field<Double> {
+	
 	override fun parse(value: String) : Double? {
 		return null
 	}