TypeScript support (#4232)

* Eclipse ignore

* TypeScript support

* Prefixing enums

* Test results

* Merged JS and TS generators

* Fixed AppVeyor build problems

* Fixed more AppVeyor build problems

* Fixed more AppVeyor build problems

* Changed TS flag to options struct

* Storing options by value

* Removed unneeded const

* Re-export support for unions

* Uint support

* Casting bools to numbers for mutation

* TS shell tests

* Reverted generates js test file to original version

* Backing up js tests and properly generating test data

tests/TypeScriptTest.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+#
+# Copyright 2016 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+pushd "$(dirname $0)" >/dev/null
+../flatc --ts --no-fb-import --gen-mutable monster_test.fbs
+../flatc -b monster_test.fbs unicode_test.json
+npm install @types/flatbuffers
+mv monster_test_generated.js monster_test_generated.js.bak
+tsc monster_test_generated.ts
+npm uninstall @types/flatbuffers
+node JavaScriptTest
+mv monster_test_generated.js.bak monster_test_generated.js