add readme file describing what worked for Windows pmag_gui standalone

the .spec file is modified and works for windows
set_scripts is the readme file that describes the workflow

pmag_gui.spec

@@ -0,0 +1,53 @@
+# -*- mode: python -*-
+
+# this is an example.spec file
+
+import os
+import sys
+from pmagpy import version
+sys.setrecursionlimit(30000)
+app_name = "pmag_gui_{}".format(version.version[7:])
+current_dir = os.getcwd()
+
+block_cipher = None
+
+files = [('{}/pmagpy/data_model/*.json'.format(current_dir), './pmagpy/data_model/'),
+         ('{}/dialogs/help_files/*.html'.format(current_dir), './dialogs/help_files')
+        ]
+
+
+a = Analysis(['programs/pmag_gui.py'],
+             pathex=[current_dir],
+             binaries=[],
+             datas=files,
+             hiddenimports=['scipy.odr', 'scipy.io', 'scipy.fftpack', 
+                            'scipy.cluster','scipy.optimize', 'scipy.interpolate',
+                            'scipy._lib.messagestream', 'scipy.datasets', 'scipy.misc',
+                            # timdeltas appears necessary for Windows with
+                            # conda-installed pyinstaller
+                            'pandas._libs.tslibs.timedeltas',
+                            'pandas.concat', 'wget', 'pkg_resources.py2_warn'],
+             hookspath=[],
+             runtime_hooks=[],
+             excludes=[],
+             win_no_prefer_redirects=False,
+             win_private_assemblies=False,
+             cipher=block_cipher)
+pyz = PYZ(a.pure, a.zipped_data,
+             cipher=block_cipher)
+exe = EXE(pyz,
+          a.scripts,
+          a.binaries,
+          a.zipfiles,
+          a.datas,
+          #name='pmag_gui',
+          name=app_name,
+          debug=False,
+          strip=False,
+          upx=True,
+          console=False, icon='./programs/images/PmagPy.ico')
+app = BUNDLE(exe,
+             #name='pmag_gui.app',
+             name=app_name + ".app",
+             icon='./programs/images/PmagPy.ico',
+             bundle_identifier=None)

setup_scripts.md

@@ -0,0 +1,25 @@
+## A workflow that worked on 2/16/2023 for Yiming Zhang for Windows 10
+
+Made a new conda enviroment 
+
+```conda create -n pmag_gui_compile python=3.9.13```
+
+Activated that conda environment:
+
+```conda activate pmag_gui_compile```
+
+```conda install future matplotlib numpy scipy pandas```
+
+- Use pip to install wxPython
+  - `pip install --upgrade -f https://wxpython.org/Phoenix/snapshot-builds/ wxPython`
+
+- Use pip to install Pyinstaller
+  - `pip install git+https://github.com/pyinstaller/pyinstaller.git`
+
+Compiled the program:
+
+```pyinstaller pmag_gui.spec```
+
+
+
+I used essentially the same pmag_gui.spec in the ```PmagPy``` repository to generate the executable file. Minor changes were necessary in the ```hiddenimports``` section where I had to add a few scipy modules in order for the excutable to initialize without crashing. That version of .spec file is saved here.