configure script changed from preload_models.py to configure_invokeai.py

This makes a cosmetic change. Instead of calling preload_models.py
(deprecated) it calls configure_invokeai.py. Currently the two do
the same thing.

source_installer/install.bat.in

@@ -5,7 +5,7 @@
 @rem For users who already have git and conda, this step will be skipped.
 
 @rem Next, it'll checkout the project's git repo, if necessary.
-@rem Finally, it'll create the conda environment and preload the models.
+@rem Finally, it'll create the conda environment and configure InvokeAI.
 
 @rem This enables a user to install this project without manually installing conda and git.
 
@@ -101,11 +101,11 @@ copy source_installer\invoke.bat.in .\invoke.bat
 copy source_installer\update.bat.in .\update.bat
 
 call conda activate invokeai
-@rem preload the models
-call python scripts\preload_models.py
+@rem call configure script
+call python scripts\configure_invokeai.py
 if "%ERRORLEVEL%" NEQ "0" (
    echo ""
-   echo "The preload_models.py script crashed or was cancelled."
+   echo "The configure script crashed or was cancelled."
    echo "InvokeAI is not ready to run. To run preload_models.py again,"
    echo "run the command 'update.bat' in this directory."
    echo "Press any key to continue"

source_installer/install.sh.in

@@ -5,7 +5,7 @@
 # For users who already have git and conda, this step will be skipped.
 
 # Next, it'll checkout the project's git repo, if necessary.
-# Finally, it'll create the conda environment and preload the models.
+# Finally, it'll create the conda environment and configure InvokeAI.
 
 # This enables a user to install this project without manually installing conda and git.
 
@@ -125,8 +125,8 @@ else
     ln -sf ./source_installer/update.sh.in ./update.sh
 
     conda activate invokeai
-    # preload the models
-    echo "Calling the preload_models.py script"
+    # configure
+    echo "Calling the configure_invokeai script"
     python scripts/configure_invokeai.py
     status=$?
     if test $status -ne 0