[PATCH] correct ToolsVersion in VS project files

Hi,

attached are patches for SVN 1.7, 1.8, 1.9 and trunk which correct the
ToolsVersion-setting in the generated project/filter files for VS >= 2010.
As of VS 2013 the ToolsVersion is no longer statically set to 4.0, but
rather to the correct toolset version (see:
https://msdn.microsoft.com/en-us/library/bb383796.aspx).

While I'm not aware of any concrete issue here, for the sake of
correctness I believe this to be a patch which is worth applying to 1.7+
(so that the in 1.7.21 mentioned VS 2015 is "as correct as possible").

The patch for 1.7 also drops a redundant entry from gen_win.py (the
VS2010 entry was specified twice there).

1.7:
[[
Sets the ToolsVersion value correctly in the VS project files for VS >=
2013.
Also drops a redundant entry for VS2010.

* build/generator/gen_vcnet_vcproj.py:
    (write_project): add data.tools_version

* build/generator/gen_win.py:
    (parse_options): remove redundant VS 2010 section and specify values for
                     tools_version
    (move_proj_file): copy tools_version to data

* build/generator/templates/neon.vcxproj.ezt
* build/generator/templates/serf.vcxproj.ezt
* build/generator/templates/svn_config.vcxproj.ezt
* build/generator/templates/svn_locale.vcxproj.ezt
* build/generator/templates/vcnet_vcxproj.ezt
* build/generator/templates/vcnet_vcxproj_filters.ezt
* build/generator/templates/zlib.vcxproj.ezt
    (): set ToolsVersion to VS version specific value
]]

1.8:
[[
Sets the ToolsVersion value correctly in the VS project files for VS >=
2013.

* build/generator/gen_vcnet_vcproj.py:
    (write_project): add data.tools_version

* build/generator/gen_win.py:
    (parse_options): specify values for tools_version
    (move_proj_file): copy tools_version to data

* build/generator/templates/serf.vcxproj.ezt
* build/generator/templates/svn_config.vcxproj.ezt
* build/generator/templates/svn_locale.vcxproj.ezt
* build/generator/templates/vcnet_vcxproj.ezt
* build/generator/templates/vcnet_vcxproj_filters.ezt
* build/generator/templates/zlib.vcxproj.ezt
    (): set ToolsVersion to VS version specific value
]]

1.9+trunk:
[[
Sets the ToolsVersion value correctly in the VS project files for VS >=
2013.

* build/generator/gen_vcnet_vcproj.py:
    (write_project): add data.tools_version

* build/generator/gen_win.py:
    (move_proj_file): copy tools_version to data

* build/generator/gen_win_dependencies.py:
    (parse_options): specify values for tools_version

* build/generator/templates/svn_config.vcxproj.ezt
* build/generator/templates/svn_locale.vcxproj.ezt
* build/generator/templates/vcnet_vcxproj.ezt
* build/generator/templates/vcnet_vcxproj_filters.ezt
    (): set ToolsVersion to VS version specific value
]]

Regards,
Stefan