[XDG] Move file location, fix typos, names, description

README.md

@@ -89,6 +89,7 @@ BEATMAP.osu`. Otherwise you may use the default `/usr/local`.
 
 If you want to have oshu integrated in your desktop:
 
+	$ cd share
 	$ desktop-file-install --dir $PREFIX/share/applications oshu.desktop
 	$ xdg-mime install x-osu.xml
 	$ xdg-mime default oshu.desktop text/x-osu

share/oshu!.desktop

@@ -0,0 +1,11 @@
+[Desktop Entry]
+Type=Application
+Name=oshu!
+GenericName=Rhythm Game
+GenericName[fr]=Jeu de Rythme
+Comment=Fast osu! port
+Comment[fr]=Adaptation rapide de osu!
+Exec=oshu %F
+MimeType=text/x-osu
+Terminal=true
+Categories=Game;X-Music;X-Rhythm

share/x-osu.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0"?>
+<mime-info xmlns='http://www.freedesktop.org/standards/shared-mime-info'>
+  <mime-type type="text/x-osu">
+    <comment>osu! beatmap file</comment>
+    <comment lang="fr">Fichier de beatmap osu!</comment>
+    <magic priority="50">
+      <match type="string" offset="0" value="osu file format"/>
+    </magic>
+    <glob pattern="*.osu"/>
+  </mime-type>
+</mime-info>