Update doco & add automation

Add some automation into the apt install, so that you don't need to worry about that.
Make sure the apt update runs successfully before doing the install
Add documentation.

install.sh

@@ -1,15 +1,20 @@
 #!/bin/bash
+
+# Find all dot files then if the original file exists, create a backup
+# Once backed up to {file}.dtbak symlink the new dotfile in place
 for file in $(find . -maxdepth 1 -name ".*" -type f  -printf "%f\n" ); do
     if [ -e ~/$file ]; then
         mv -f ~/$file{,.dtbak}
     fi
     ln -s $PWD/$file ~/$file
 done
- if hash vim-addon  2>/dev/null; then
+
+# Check if vim-addon installed, if not, install it automatically
+if hash vim-addon  2>/dev/null; then
     echo "vim-addon (vim-scripts)  installed"
-     else
-         echo "vim-addon (vim-scripts) not installed, running 'sudo apt update; sudo apt install bc'"
-         sudo apt update; sudo apt install vim-scripts
+else
+    echo "vim-addon (vim-scripts) not installed, installing"
+    sudo apt update && sudo apt -y install vim-scripts
 fi
 
 echo "Installed"