Remove warnings, Add .gitignore

.gitignore

@@ -0,0 +1 @@
+target

src/main.rs

@@ -60,7 +60,7 @@ fn main() {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use clap::{App, Arg, ArgMatches, ErrorKind, Values};
+    use clap::{App, ErrorKind};
 
     #[test]
     fn test_exchange_rate_de() -> Result<(), String> {

src/transactions.rs

@@ -403,7 +403,7 @@ mod tests {
             ),
         ];
 
-        let detailed_sold_transactions =
+        let _detailed_sold_transactions =
             reconstruct_sold_transactions(&parsed_sold_transactions, &parsed_gains_and_losses);
     }
 
@@ -518,7 +518,7 @@ mod tests {
 
         let parsed_gains_and_losses: Vec<(String, String, f32, f32, f32)> = vec![];
 
-        let detailed_sold_transactions =
+        let _detailed_sold_transactions =
             reconstruct_sold_transactions(&parsed_sold_transactions, &parsed_gains_and_losses);
     }
 }