Cleaned up project euler folder and moved the license and readme

projecteuler/base.cpp

@@ -1,5 +1,4 @@
-#include <iostream>
-#include <chrono>
+#include <bits/stdc++.h>
 
 using namespace std;
 
@@ -13,4 +12,4 @@ int main(){
     auto duration = chrono::duration_cast<chrono::milliseconds>(chrono::high_resolution_clock::now() - start);
     cout << (float)duration.count()/1000 << endl;
     return 0;
-}
+}