update readme

README.org

@@ -16,14 +16,21 @@ This package is in its early stage, although the core functionality works right
 
 * Usage
 #+begin_src zig
-const Easy = @import("curl").Easy;
+const curl = @import("curl");
 
 pub fn main() !void {
+    try curl.global_init();
+    defer curl.global_deinit();
+
+    // Use zig's std.crypto.Certificate.Bundle
+    // Required if using builtin libcurl if TLS connections are required
+    try curl.refresh_ca_bundle();
+
     var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
     defer arena.deinit();
     const allocator = arena.allocator();
 
-    const easy = try Easy.init(allocator);
+    const easy = try curl.Easy.init(allocator);
     defer easy.deinit();
 
     const resp = try easy.get("http://httpbin.org/anything");
@@ -66,8 +73,9 @@ const curl = b.dependency("curl", .{});
 
 // add curl module to an executable.
 exe.addModule("curl", curl.module("curl"));
-// Note: since this package doesn't bundle static libcurl,
-// so users need to link to system-wide libcurl.
+// For builtin libcurl
+exe.linkLibrary(curl.artifact("curl"));
+// For system-wide libcurl
 exe.linkSystemLibrary("curl");
 exe.linkLibC();
 #+end_src