Fix exports

Closes #18

index.ts

@@ -1,4 +1,27 @@
-export * as signature from './src/signature'
-export * as boxes from './src/boxes'
-export * as JWT from './src/jwt'
+import * as sig from './src/signature'
+import * as bx from './src/boxes'
+import * as jwt from './src/jwt'
+
+export const JWT = jwt.JWTcontext
+export const boxes = {
+    secret: {
+        box: bx.SecretBox,
+        wrap: bx.SecretWrap
+    },
+    private: {
+        box: bx.PrivateBox,
+        wrap: bx.SecretWrap
+    },
+    pwd: {
+        box: bx.PwdBox,
+        wrap: bx.PwdWrap
+    },
+}
+export const signature = {
+    sign: sig.sign,
+    verify: sig.verify,
+    gen_keypair: sig.gen_keypair,
+    from_password: sig.from_password,
+}
+
 export {pbkdf} from './src/pbkdf'