Update installer script and instructions for Windows.

Also, switch to Inno Setup 6.

README.Windows

@@ -20,16 +20,18 @@ MinGW
 Qt 5.9
 git
 cygwin (optional) - if you want to debug, you'll need gdb from cygwin.
+cmake (optional)
 
 Microsoft Tools Build:
 ------------------------------------
 Visual C++
 Qt 5.9
 git
+cmake (optional)
 
 Installer build:
 ------------------------------------
-Inno Setup 5
+Inno Setup 6
 
 
 Also, you'll need to make sure the following things are set appropriately
@@ -74,12 +76,27 @@ working executable...
   projects (the minimum projects which are part of a standard Quackle install).
 
 
+NEW BUILD SYSTEM COMING
+-----------------------
+Quackle 1.0.4 was built with cmake and vcpkg.  This very much lowers the barrier
+to getting a build up and running.  Basic outline:
+
+* Install qt5 in vcpkg (note vcpkg defaults to 32-bit, so tell it if you want
+  64-bit)
+* Set environment variable Qt5DIR=<vcpkg_dir>\installed\<platform>\share\cmake\Qt5
+* Run cmake pointing to the quacker/ directory
+* Build from cmake as usual or, if you built using Visual Studio, you can open the
+  generated solution file
+
+More detailed instructions coming later.
+
+
 Additional things to know:
 --------------------------
 * To build the Quackle installer,
-  + Copy Qt5Core.dll, Qt5Widgets.dll and Qt5Gui.dll from Qt's bin/ directory into quackle\
-  + If you're building with MinGW, copy mingwm10.dll, libstdc++-6.dll, and
-    libgcc_s_dw2-1.dll from MinGW's bin/ directory into quackle\
+  + Run a cmake build in quacker\build
+  + Build the RelWithDebInfo build
+  + Copy any needed DLLs into build\RelWithDebInfo
   + From the Quackle directory, run the following...
     <full path to Inno Setup's ISCC.exe> installer.iss /FQuackleInstaller /O. /Q
   + Find the file QuackleInstaller.exe in the quackle\ directory.

installer.iss

@@ -4,7 +4,9 @@
 [Setup]
 AppName=Quackle
 AppVerName=Quackle 1.0.4
-DefaultDirName={pf}\Quackle
+ArchitecturesAllowed=x64
+ArchitecturesInstallIn64BitMode=x64
+DefaultDirName={commonpf}\Quackle
 DefaultGroupName=Quackle
 ChangesAssociations=yes
 UninstallDisplayIcon={app}\Quackle.exe
@@ -21,11 +23,13 @@ Root: HKCR; Subkey: "QuackleGameFile\shell\open\command"; ValueType: string; Val
 
 
 [Files]
-Source: "quacker\release\Quackle.exe"; DestDir: "{app}"
+Source: "quacker\build\RelWithDebInfo\Quackle.exe"; DestDir: "{app}"
 Source: "LICENSE"; DestDir: "{app}"
-Source: "Qt5Core.dll"; DestDir: "{app}"
-Source: "Qt5Gui.dll"; DestDir: "{app}"
-Source: "Qt5Widgets.dll"; DestDir: "{app}"
+Source: "quacker\build\RelWithDebInfo\*.dll"; DestDir: "{app}"
+; Assuming either a cmake process or a human copied the DLL files
+; in the same dir.  Right now, I'm building from vcpkg, and the list of DLLs
+; is Qt5Core, Qt5Gui, Qt5Widgets, zlib1, bz2, freetype, harfbuzz, libpng16, pcre2-16.
+; But, depending upon your build chain, this will vary. -jfultz
 
 Source: "data\themes\*"; DestDir: "{app}\data\themes"
 Source: "data\alphabets\*"; DestDir: "{app}\data\alphabets"