doc updates; clean up install directory

- Large rewrite of documentation for automated and manual install.
- Reorganize installer zip file to reduce visual clutter for user.

installer/lib/main.py

@@ -0,0 +1,54 @@
+"""
+InvokeAI Installer
+"""
+
+import argparse
+from pathlib import Path
+from installer import Installer
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument(
+        "-r",
+        "--root",
+        dest="root",
+        type=str,
+        help="Destination path for installation",
+        default="~/invokeai",
+    )
+    parser.add_argument(
+        "-y",
+        "--yes",
+        "--yes-to-all",
+        dest="yes_to_all",
+        action="store_true",
+        help="Assume default answers to all questions",
+        default=False,
+    )
+
+    parser.add_argument(
+        "--version",
+        dest="version",
+        help="Version of InvokeAI to install. Default to the latest stable release. A special 'pre' value will install the latest published pre-release version.",
+        default=None,
+    )
+
+    parser.add_argument(
+        "--find-links",
+        dest="find_links",
+        help="Specifies a directory of local wheel files to be searched prior to searching the online repositories.",
+        type=Path,
+        default=None,
+    )
+    
+    args = parser.parse_args()
+
+    inst = Installer()
+
+    try:
+        inst.install(**args.__dict__)
+    except KeyboardInterrupt as exc:
+        print("\n")
+        print("Ctrl-C pressed. Aborting.")
+        print("Come back soon!")