Readme Update

[MattToast]

Updates to the SmartSim README for upcoming release.

• Update examples to use new experiment api (create_run_settings, create_batch_settings)
• Update supported ML backend versions
• Add clarify info to examples where I though useful
• Spelling/typos/grammar

[al-rigazzi]

Very good job, just a couple of minor typos remaining, otherwise LGTM

[Spartee]

LGTM!

[ben-albrecht]

I ran scspell on this branch's README and caught a few more typos:

diff --git a/README.md b/README.md
index 3822d24..5cd9d8d 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,7 @@ TODO: Check if new table is what is expected
       <td>1.7.0</td>
     </tr>
     <tr>
-      <td>Tensorlow\Keras</td>
+      <td>Tensorflow\Keras</td>
       <td>2.5.2</td>
     </tr>
     <tr>
@@ -86,7 +86,7 @@ TODO: Check if new table is what is expected
       <td>1.9.1</td>
     </tr>
     <tr>
-      <td>Tensorlow\Keras</td>
+      <td>Tensorflow\Keras</td>
       <td>2.6.2</td>
     </tr>
     <tr>
@@ -455,7 +455,7 @@ db_cluster = PBSOrchestrator(db_nodes=3, db_port=6780, batch=True,
 exp.start(db_cluster)
 
 print(f"Orchestrator launched on nodes: {db_cluster.hosts}")
-# launch models, anaylsis, training, inference sessions, etc
+# launch models, analysis, training, inference sessions, etc
 # that communicate with the database using the SmartRedis clients
 
 exp.stop(db_cluster)
@@ -598,7 +598,7 @@ scripts if there is no database for them to connect to.
 The example below shows how to take a PyTorch model, send it to the Orchestrator, and
 execute it on data stored within the database.
 
-Notice that when we set the model in the database, we set the device arguement to
+Notice that when we set the model in the database, we set the device argument to
 **GPU**. By doing this we ensure that execution of the model takes place on a GPU if
 one is available to the database.
 
@@ -927,7 +927,7 @@ TODO: Again confirm that this should be replaced with new table
       <td>1.7.0</td>
     </tr>
     <tr>
-      <td>Tensorlow\Keras</td>
+      <td>Tensorflow\Keras</td>
       <td>2.5.2</td>
     </tr>
     <tr>
@@ -939,7 +939,7 @@ TODO: Again confirm that this should be replaced with new table
       <td>1.9.1</td>
     </tr>
     <tr>
-      <td>Tensorlow\Keras</td>
+      <td>Tensorflow\Keras</td>
       <td>2.6.2</td>
     </tr>
     <tr>

[MattToast]

@ben-albrecht Thanks for the catch! Fixed in latest commit