Subject(remove-odd):add readmed

subjects/removeodd/README.md

@@ -0,0 +1,36 @@
+## remove-odd
+
+### Instructions
+
+Write a function named `RemoveOdd(string)` that takes a string and returns a new string with all the odd characters removed.
+- The function should skip spaces.
+
+### Expected function 
+```go
+func RemoveOdd(string) string{
+    // your code here
+}
+```
+
+### Usage
+
+``` go
+package main
+
+import "fmt"
+
+func main(){
+    fmt.Println(RemoveOdd("Hello World"))
+    fmt.Println(RemoveOdd("H"))
+    fmt.Println(RemoveOdd("How are you?"))
+}
+```
+
+and the output should be:
+
+```console
+$ go run . 
+Hlo Wrd
+H
+Hw ae yu
+```