Documentation and tweaks for release

Author: johnstevenson

CHANGELOG.md

@@ -1,5 +1,5 @@
 ## v4.8.0
-Not yet released
+2017-11-11
 
 * Changed error reporting by forcing all errors to stderr with ini overrides.
 * Changed detection of old PHP versions for better error handling.

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2012-2016 John Stevenson
+Copyright (c) 2012-2017 John Stevenson
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -5,6 +5,7 @@ The Windows installer for the [Composer][composer] PHP Dependency Manager. [**Do
 ## Contents
 * [About](#About)
 * [Details](#Details)
+* [Php Ini File](#Php-Ini_File)
 * [Troubleshooting](#Troubleshooting)
 * [Uninstalling](#Uninstalling)
 * [Install Locations](#Locations)
@@ -39,7 +40,7 @@ searches common locations on your computer and presents you with its findings. I
 will display this value. If not, or you want to choose a different PHP, you must select from the list or hunt around manually.
 
 The installer will then check that PHP and your path are set up correctly. If it finds any errors it will give you
-the chance to fix them. It will also offer to either create or modify the `php.ini` file if required settings do not exist.
+the chance to fix them. It will also offer to either create or modify the `php.ini` file if required settings do not exist. See [Php Ini File](#Php-Ini-File) for more information.
 
 Next, the installer will ask if you need a proxy server to connect to the internet. If it finds any values in your
 *Internet Settings* or your environment, then the proxy url will be displayed.
@@ -48,6 +49,15 @@ After you have reviewed and accepted your settings, the installer will download
 environment has been changed, it is important to close your current terminal and open a new one so that the changes get
 loaded. The installer will remind you if this is the case.
 
+<a name="Php-Ini-File"></a>
+## Php Ini File
+Composer-Setup will either create a new `php.ini` or modify an existing file if any settings needed by Composer are missing:
+
+* `allow_url_fopen` set to on
+* `open_ssl` and `mbstring` extensions enabled
+
+When creating a new file, the _php.ini-production_ file is used with `extension_dir` and `date.timezone` values appropriately set. When modifying an existing file, a backup is created in the same directory, named `php.ini~orig`.
+
 <a name="Troubleshooting"></a>
 ## Troubleshooting
 Composer-Setup creates a log file, which may be useful to review if you experience any issues. This is stored in your

src/composer.iss

@@ -1376,9 +1376,10 @@ begin
   Result := '';
   UintCode := ExitCode;
   Suffix := ' Try reinstalling the program to fix this problem.';
+  AddStr(Suffix, ' Make sure you have installed the appropriate Visual C++ Redistributable.');
 
   if ExitCode > 0 then
-    Result := SysErrorMessage(ExitCode)
+    Result := Format('Reported error: %s', [SysErrorMessage(ExitCode)])
   else if UintCode = $C0000135 then
     {STATUS_DLL_NOT_FOUND}
     Result := 'The program cannot start because a dll was not found.' + Suffix;