Figured out a way to update tlauncher, and update README.md

README.md

@@ -1,13 +1,18 @@
 # TLauncher
-This is a repo that i made to install TLauncher on Arch Linux directly from their [site](https://tlauncher.org/), but i didn't figure it out yet how to update TLauncher.
+This is a repo that i made to install TLauncher on Arch Linux directly from their [site](https://tlauncher.org/).
 
 ## How to install
 
-1.
+1. Change the permissions of the script
     ```c 
     chmod +x ./install.sh
     ```
-2. 
+2. Install tlauncher
     ```c
     ./install.sh
     ```
+
+## Usage
+After the installation, you can just type `tlauncher` in the terminal to launch tlauncher.
+
+If you wanna update type `tlauncher --update` or `tlauncher -u`, for downloading the last version of tlauncher _(It's not the best way of doing this, but it will do it for now)_. 

src/tlauncher

@@ -1,2 +1,22 @@
 #!/bin/bash
+
+function update() {
+  wget https://tlauncher.org/jar -P /tmp
+  unzip /tmp/jar -d /tmp/tlauncher
+  sudo mv /tmp/tlauncher/*.jar /usr/share/tlauncher/tlauncher.jar
+  rm /tmp/jar
+  rm -rf /tmp/tlauncher/
+}
+
+
+while [[ "$1" ]]; do
+  case "$1" in
+    "--update" | "-u")
+      update 
+      ;;
+    *)
       java -jar /usr/share/tlauncher/tlauncher.jar
+      ;;
+  esac
+  shift
+done