add uefi features

jwm/rootfs/etc/obarun/install.conf

@@ -27,11 +27,11 @@ GIT_ADDR="https://framagit.org/Obarun/obarun-install.git"
 # git source of obarun-install-themes package 
 GIT_ADDR_THEMES="https://framagit.org/Obarun/obarun-install-themes.git"
 
-# git branch to use, if not set master is took by default
+# git branch to use for obarun-install, if not set master is took by default
 BRANCH=""
 
 # git branch to use for obarun-install-themes, if not set master is took by default
-THEMES_BRANCH=""
+BRANCH_THEMES=""
 
 # gpg directory used during the installation
 GPG_DIR="/var/lib/obarun/gnupg"
@@ -52,6 +52,9 @@ CACHE_DIR="/var/cache/pacman/pkg"
 # expected value are yes or no without uppercase
 RANKMIRRORS="no"
 
+# firmware interface to use for the installation
+FIRMWARE="BIOS"
+
 #########################
 ## Customization variable
 #########################