Changed id field of the Song model (#22)

* Changed id field of the Song model

* Updated Readme

README.md

@@ -43,7 +43,7 @@ icarus-dm download -u spacecadet -p stellar40 -h https://icarus.com -b 15
 ### Uploading Song with metadata
 
 ```BASH
-icarus-dm upload-meta -u spacecadet -p stellar40 -h https://icarus.com -s /path/of/song.mp3 -t 1 -m /path/to/metadata/config/collection.json -ca /path/to/cover/art/image.png
+icarus-dm upload-meta -u spacecadet -p stellar40 -h https://icarus.com -s /path/of/song.wav -t 1 -m /path/to/metadata/config/collection.json -ca /path/to/cover/art/image.png
 ```
 
 ### Uploading Song with metadata from directory

src/models/song.rs

@@ -7,7 +7,7 @@ use crate::constants;
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct Song {
-    #[serde(alias = "song_id")]
+    #[serde(alias = "id")]
     pub id: Option<i32>,
     pub title: Option<String>,
     pub artist: Option<String>,