Better windows build system using pynsist. Add recipe for installer,

update docs, ignore the output directory, and add a patch that needs to
prepend plchat.py before building.

.gitignore

@@ -1,3 +1,4 @@
 __pycache__
 plchat.build
 dist
+build

README.md

@@ -9,10 +9,9 @@ Run the binary or `python plchat.py`. Log in to your account on the fediverse an
 Installation instructions for PlChat. If you are looking to package this program or build from source, skip to Building From Source or Packaging down below.
 
 ### Windows
-Download and install [python 3.8.9](https://www.python.org/downloads/windows/) from the python.org and the [k-lite codec pack](https://www.codecguide.com/download_kl.htm). The basic version with default options should work fine.
+Download and install the [k-lite codec pack](https://www.codecguide.com/download_kl.htm). The basic version with default options should work fine.
 
-Download the latest plchat_windows.zip from https://git.waldn.net/git/knotteye/plchat/releases extract the zip file. Run setup.bat, and keep the setup-log file if something does not work. Run plchat.exe and log in!
+Download the latest plchat_windows.zip from https://git.waldn.net/git/knotteye/plchat/releases extract the zip file. Run the installer.
-No guarantees on Windows 7, but windows 8 and 10 should work fine.
 
 ### Linux
 A prepackaged deb file is provided in https://git.waldn.net/git/knotteye/plchat/releases as well as a compiled binary for amd64 linux.

installer.cfg

@@ -0,0 +1,54 @@
+[Application]
+name=PlChat
+version=1.0.1
+script=plchat.py
+icon=fedi.ico
+license_file=LICENSE
+console=false
+
+[Python]
+version=3.8.9
+include_msvcrt=true
+
+[Include]
+pypi_wheels = PyQt5==5.15.2
+	PyQt5-sip==12.8.1
+	appdirs==1.4.4
+	keyring==23.0.1
+	python-magic-bin==0.4.14
+	notify-py==0.3.1
+	python-dateutil==2.8.1
+	requests==2.25.1
+	urllib3==1.26.4
+	websockets==8.1
+	importlib-metadata==3.10.1
+	certifi==2020.12.5
+	chardet==4.0.0
+	colorama==0.4.4
+	idna==2.10
+	importlib-metadata==3.10.1
+	loguru==0.5.3
+	pywin32-ctypes==0.2.0
+	requests-download==0.1.2
+	six==1.15.0
+	urllib3==1.26.4
+	websockets==8.1
+	win32-setctime==1.0.3
+	yarg==0.1.9
+	zipp==3.4.1
+
+files = COPYING
+	LICENSE
+	README.md
+	send.svg
+	unread.svg
+	fedi.svg
+	fedi.ico
+
+packages= audiowidget
+	misc
+	monkeypatch
+	plchat
+	pleroma
+	timeconvert
+	videowidget

windows.patch

@@ -0,0 +1,9 @@
+#!python3.8
+import sys, os
+import site
+
+scriptdir, script = os.path.split(os.path.abspath(__file__))
+pkgdir = os.path.join(scriptdir, 'pkgs')
+# Ensure .pth files in pkgdir are handled properly
+site.addsitedir(pkgdir)
+sys.path.insert(0, pkgdir)