Added libcurl-x64.dll to bin/Debug directory to resolve runtime DLL dependency issue.

main.cpp

@@ -36,10 +36,12 @@ Input input_data(istream& in, bool prompt) {
 }
 
 int main() {
+    curl_global_init(CURL_GLOBAL_ALL);
     Input input;
 
     const auto bins = make_histogram(input.numbers, input.bin_count);
     show_histogram_svg(bins);
+    curl_global_cleanup();
 
     return 0;
 }