Recommend installing gperf through vcpkg in examples.

Author: levlam

example/csharp/README.md

@@ -7,13 +7,12 @@ This is an example of building TDLib with `C++/CLI` support and an example of TD
 * Download and install Microsoft Visual Studio 2015 or later.
 * Download and install [CMake](https://cmake.org/download/); choose "Add CMake to the system PATH" option while installing.
 * Install [vcpkg](https://github.com/Microsoft/vcpkg#quick-start) or update it to the latest version using `vcpkg update` and following received instructions.
-* Install `zlib` and `openssl` using `vcpkg`:
+* Install `gperf`, `zlib`, and `openssl` using `vcpkg`:
 ```
 cd <path to vcpkg>
-.\vcpkg.exe install openssl:x64-windows openssl:x86-windows zlib:x64-windows zlib:x86-windows
+.\vcpkg.exe install gperf:x64-windows gperf:x86-windows openssl:x64-windows openssl:x86-windows zlib:x64-windows zlib:x86-windows
 ```
 * (Optional. For XML documentation generation.) Download [PHP](https://windows.php.net/download#php-7.2). Add the path to php.exe to the PATH environment variable.
-* Download and install [gperf](https://sourceforge.net/projects/gnuwin32/files/gperf/3.0.1/). Add the path to gperf.exe to the PATH environment variable.
 * Build `TDLib` with CMake enabling `.NET` support and specifying correct path to `vcpkg` toolchain file:
 ```
 cd <path to TDLib sources>/example/csharp

example/uwp/README.md

@@ -7,13 +7,12 @@ This is an example of building TDLib SDK for Universal Windows Platform and an e
 * Download and install Microsoft Visual Studio 2015+ with Windows 10 SDK. We recommend to use the latest available versions of Microsoft Visual Studio and Windows 10 SDK.
 * Download and install [CMake](https://cmake.org/download/).
 * Install [vcpkg](https://github.com/Microsoft/vcpkg#quick-start) or update it to the latest version using `vcpkg update` and following received instructions.
-* Install `zlib` and `openssl` for all UWP architectures using `vcpkg`:
+* Install `zlib` and `openssl` for all UWP architectures and `gperf` for x86 using `vcpkg`:
 ```
 cd <path to vcpkg>
-.\vcpkg.exe install openssl-uwp:arm-uwp openssl-uwp:x64-uwp openssl-uwp:x86-uwp zlib:arm-uwp zlib:x64-uwp zlib:x86-uwp
+.\vcpkg.exe install gperf:x86-windows openssl-uwp:arm-uwp openssl-uwp:x64-uwp openssl-uwp:x86-uwp zlib:arm-uwp zlib:x64-uwp zlib:x86-uwp
 ```
 * (Optional. For XML documentation generation.) Download [PHP](https://windows.php.net/download#php-7.2). Add the path to php.exe to the PATH environment variable.
-* Download and install [gperf](https://sourceforge.net/projects/gnuwin32/files/gperf/3.0.1/). Add the path to gperf.exe to the PATH environment variable.
 * Download and install [7-Zip](http://www.7-zip.org/download.html) archiver, which is used by the `build.ps1` script to create a Telegram.Td.UWP Visual Studio Extension. Add the path to 7z.exe to the PATH environment variable.
   Alternatively `build.ps1` supports compressing using [WinRAR](https://en.wikipedia.org/wiki/WinRAR) with option `-compress winrar` and compressing using [zip](http://gnuwin32.sourceforge.net/packages/zip.htm) with `-compress zip`.
 * Build `TDLib` using provided `build.ps1` script (TDLib should be built 6 times for multiple platforms in Debug and Release configurations, so it make take few hours). Pass path to vcpkg.exe as `-vcpkg-root` argument, for example:
@@ -23,7 +22,7 @@ powershell -ExecutionPolicy ByPass .\build.ps1 -vcpkg_root C:\vcpkg
 If you need to restart the build from scratch, call `.\build.ps1 -mode clean` first.
 * Install Visual Studio Extension "TDLib for Universal Windows Platform" located at `build-uwp\vsix\tdlib.vsix`, which was created on the previous step by `build.ps1` script.
 
-Now `TDLib` can be freely used from any UWP project, built in Visual Studio.
+Now `TDLib` can be used from any UWP project, built in Visual Studio.
 
 ## Example of usage
 The `app/` directory contains a simple example of a C# application for Universal Windows Platform. Just open it with Visual Studio 2015 or later and run.