Rename RippleAPI client to Client (#1520)

* rename RippleAPI -> XrplClient

* more renames

* move API stuff to client folder

* rename all api -> client

* fix tests

* make tests run

* fix integ tests

* fix urls

* fix merge issues

* XrplClient -> Client

* fix merge issues

* rename xrpl-client npm symlink to xrpl-local

test/client/submit/index.ts

@@ -0,0 +1,19 @@
+import responses from '../../fixtures/responses'
+import {assertRejects, assertResultMatch, TestSuite} from '../../utils'
+
+/**
+ * Every test suite exports their tests in the default object.
+ * - Check out the "TestSuite" type for documentation on the interface.
+ * - Check out "test/client/index.ts" for more information about the test runner.
+ */
+export default <TestSuite>{
+  'submit': async (client, address) => {
+    const result = await client.submit(responses.sign.normal.signedTransaction)
+    assertResultMatch(result, responses.submit, 'submit')
+  },
+
+  'submit - failure': async (client, address) => {
+    await assertRejects(client.submit('BAD'), client.errors.RippledError)
+    // assert.strictEqual(error.data.resultCode, 'temBAD_FEE')
+  }
+}