Updated manual install instructions to handle old symlink installs.

README.md

@@ -68,13 +68,16 @@ extract the archive, open a shell into its directory, and run:
 
 Alternately, if you plan on doing development on the extension, or testing modifications, it's advised you checkout the Git repository and install a symlink. First, install git if you don't have it: (sudo apt-get install git-core, sudo pacman -S git, etc), then run:
 
-    mkdir ~/git_projects
-    cd ~/git_projects
-    git clone git://github.com/paradoxxxzero/gnome-shell-system-monitor-applet.git    
+    GIT_PROJECTS=~/git_projects
+    [email protected]
+    mkdir $GIT_PROJECTS
+    cd $GIT_PROJECTS
+    git clone git://github.com/paradoxxxzero/gnome-shell-system-monitor-applet.git $PROJECT_NAME
     mkdir -p ~/.local/share/gnome-shell/extensions
     cd ~/.local/share/gnome-shell/extensions
-    ln -s ~/git_projects/gnome-shell-system-monitor-applet/[email protected]
-    gnome-shell-extension-tool [email protected]
+    { [ -d "./$PROJECT_NAME" ] || [ -L "./$PROJECT_NAME" ]; } && rm -Rf "./$PROJECT_NAME"
+    ln -s $GIT_PROJECTS/gnome-shell-system-monitor-applet/$PROJECT_NAME
+    gnome-shell-extension-tool --enable-extension=$PROJECT_NAME
 
 And restart gnome-shell (`Alt + F2`, then `r`) or reboot the machine.
 
@@ -90,15 +93,15 @@ If we do not have the translation of your language and you want to translate by
 
 #### Deployment
 
-To create a zip file with the specified version number, ready to upload to [Gnome Shell Extensions](https://extensions.gnome.org/) or similar repository, run:
+1. To create a zip file with the specified version number, ready to upload to [Gnome Shell Extensions](https://extensions.gnome.org/) or similar repository, run:
 
     make zip-file VERSION=<version>
 
 To determine the version number to use, check the extensions site and increment from the largest published version.
 
 The specified version number is just for documentation and isn't strictly necessary in the uploaded file, since the extensions website will dynamically set this and override whatever we enter.
 
-Once uploaded, [create a Github release](https://github.com/paradoxxxzero/gnome-shell-system-monitor-applet/releases) with the same version number.
+2. Once uploaded, [create a Github release](https://github.com/paradoxxxzero/gnome-shell-system-monitor-applet/releases) with the same version number.
 
 ### Authors