Issue 2599, 2940 - Fix the presence of correct ATL version

README.md

Index: README.md
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--- a/README.md
+++ b/README.md
@@ -17,8 +17,11 @@
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 You need Microsoft Visual C++ 2012 and Python 2.7. Make sure that `python.exe` 
-is on your `PATH`. Unfortunately until we move to Visual Studio 2013  you'll
-need to use Visual Studio 2012 version that comes with ATL (Proffessional etc). 
+is on your `PATH`. When building with Express edition you also need some
+Visual Studio which comes with ATL. For example, if you use Visual Studio 2013
+Community Edition then set `VCInstallDir_120` environment variable to the
+directory of Visual C++ (for example,
+`C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC`).

[Eric, 2015/08/26 18:25:35]

This comment does not explain things adequately.

-- It assumes that users know the difference between VS versions and toolset
versions. This is manifestly not obvious, and needs some explanation.

-- Are you requiring VS 2013 or just recommending it?

-- What has been actually tested? VS 2013 Community, VS 2015 Community, other
editions?

Given all the difficulty actually making this work, it would be a good idea to
designate a reference environment that is known to work.

[sergei, 2015/08/26 21:47:54]

Do you mean that user does not know about absence of ATL in the Express edition
in MSVS2012? I don't think we should explain the difference between MSVS
editions. Let leave for Microsoft.
There is neither recommendation of MSVS 2013 nor requirement of it. We are
merely kindly added the support of MSVS2013 and explaining the peculiarity how
to get it working.
MSVS 2012 Express edition with MSVS 2013 Community edition.
Added.

 
 * Execute `createsolution.bat` to retrieve dependencies and generate project
 files, this will create `build\ia32\adblockplus.sln` (solution for the 32 bit