add fontconfig configuration and add it to installation instructions

Author: Mélanie Chauvel

README.md

@@ -54,7 +54,8 @@ Frequently asked questions are answered in our [FAQ](FAQ.md).
 1. Download the [latest version of Hack][ttf_latest].
 2. Extract the files from the archive (`.zip`).
 3. Copy the font files to either your system font folder (often `/usr/share/fonts/`) or user font folder (often `~/.local/share/fonts/` or `/usr/local/share/fonts`).
-4. Clear and regenerate your font cache and indexes with the following set of commands:
+4. Copy the font configuration file in `config/fontconfig/` to either the system font configuration folder (often `/etc/fonts/conf.d/`) or the font user folder (often `~/.config/fontconfig/conf.d`)
+5. Clear and regenerate your font cache and indexes with the following command:
 
 ```
 $ fc-cache -f -v
@@ -223,4 +224,3 @@ See [LICENSE.md](https://github.com/source-foundry/Hack/blob/master/LICENSE.md)
 <!-- Link to the latest release archive for README.md file -->
 
 [ttf_latest]: https://github.com/source-foundry/Hack/releases/download/v3.002/Hack-v3.002-ttf.zip
-

config/fontconfig/45-Hack.conf

@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
+<fontconfig>
+  <!-- Declare Hack a monospace font -->
+  <alias>
+    <family>Hack</family>
+    <default><family>monospace</family></default>
+  </alias>
+  <!-- if this file is put in user’s configuration, unset sans-serif family -->
+  <match>
+    <test compare="eq" name="family">
+        <string>Hack</string>
+    </test>
+    <test compare="eq" name="family">
+        <string>sans-serif</string>
+    </test>
+    <edit mode="delete" name="family"/>
+  </match>
+</fontconfig>

docs/CONTRIBUTORS.md

@@ -94,6 +94,7 @@
 
 - Guilherme Amadio - Linux
 - Helio Chissini de Castro - Linux
+- Mélanie Chauvel (ariasuni) - Linux
 - Samina Fu - cdnjs
 - Michael "Tex" Hex - Windows
 - Paride Legovini - Linux