added pre installation script to check for and install omz/zsh

install.conf.yaml

@@ -0,0 +1,10 @@
+- clean: ['~', '~/.oh-my-zsh/custom/', '~/.oh-my-zsh/custom/plugs/']
+
+- shell:
+        - [sh pre-install.sh, Running setup script]
+        - [mkdir -p ~/oh-my-zsh/custom/, creating zsh custom folders]
+        - [mkdir -p ~/oh-mh-zsh/custom/themes] 
+        - [mkdir -p ~/oh-my-zsh/custom/plugins]
+        - [git submodule update --init --recursive, Installing submodules]
+        - [sh fonts/install.sh, Installing Powerline fonts]
+        

pre-install.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+OMZDIR="$HOME/.oh-my-zsh"
+if [ ! -d "$OMZDIR" ]; then
+	echo "Installing oh-my-zsh"
+	/bin/sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
+else
+	echo "Consider updating oh-my-zsh using: omz update"
+fi 
+shl=$(ps -hp $$|awk '{echo $5}')
+if [ ! $shl = "/bin/zsh" ]; then
+	echo "Changing default shell to zsh"
+	chsh -s /bin/zsh 
+else
+	echo "zsh already enabled"
+fi
+