Update docs to link to training and evaluation (#8859)

research/object_detection/README.md

@@ -54,16 +54,21 @@ Note: The models we provide in [TF2 Zoo](g3doc/tf2_detection_zoo.md) and
 [TF1 Zoo](g3doc/tf1_detection_zoo.md) are specific to the TensorFlow major
 version and are not interoperable.
 
-Please select one of the two links below for TensorFlow version specific
+Please select one of the links below for TensorFlow version-specific
 documentation of the Object Detection API:
 
 <!-- mdlint off(WHITESPACE_LINE_LENGTH) -->
-
-
-| [![Object Detection API TensorFlow 2](https://img.shields.io/badge/Object%20Detection%20API-TensorFlow%202-orange)](g3doc/tf2.md) | [![TensorFlow 2 Model Zoo](https://img.shields.io/badge/Model%20Zoo-TensorFlow%202-Orange)](g3doc/tf2_detection_zoo.md) |
-|---|---|
-| [![Object Detection API TensorFlow 1](https://img.shields.io/badge/Object%20Detection%20API-TensorFlow%201-orange)](g3doc/tf1.md) | [![TensorFlow 1 Model Zoo](https://img.shields.io/badge/Model%20Zoo-TensorFlow%201-Orange)](g3doc/tf1_detection_zoo.md) |
-
+### Tensorflow 2.x
+  *   <a href='g3doc/tf2.md'>
+        Object Detection API TensorFlow 2</a><br>
+  *   <a href='g3doc/tf2_detection_zoo.md'>
+        TensorFlow 2 Model Zoo</a><br>
+
+### Tensorflow 1.x
+  *   <a href='g3doc/tf1.md'>
+        Object Detection API TensorFlow 1</a><br>
+  *   <a href='g3doc/tf1_detection_zoo.md'>
+        TensorFlow 1 Model Zoo</a><br>
 <!-- mdlint on -->
 
 ## Whats New

research/object_detection/g3doc/tf1.md

@@ -73,6 +73,8 @@ the [Model Zoo](tf1_detection_zoo.md).
       Supported object detection evaluation protocols</a><br>
 *   <a href='tpu_compatibility.md'>
       TPU compatible detection pipelines</a><br>
+*   <a href='tf1_training_and_evaluation.md'>
+      Training and evaluation guide (CPU, GPU, or TPU)</a><br>
 
 ## Extras:
 

research/object_detection/g3doc/tf2.md

@@ -80,3 +80,5 @@ We provide a large collection of models that are trained on COCO 2017 in the
       Supported object detection evaluation protocols</a><br>
 *   <a href='tpu_compatibility.md'>
       TPU compatible detection pipelines</a><br>
+*   <a href='tf2_training_and_evaluation.md'>
+      Training and evaluation guide (CPU, GPU, or TPU)</a><br>
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