Refactor example hooks

Author: Alexei Chekulaev

example/example.filelist

@@ -1 +1,14 @@
-some-additional-files/somefile
+# If you want to include more than a single script file
+# You do it by creating addon.filelist file
+# where all additional files should be described.
+# One line per file, paths relative to current folder.
+
+# Here is additional files
+some-additional-files/somefile
+
+# If you want to use hooks they should also be included here 
+# or they won't get downloaded and executed
+example.pre-install
+example.post-install
+example.pre-uninstall
+example.post-uninstall

example/example.post-install

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+echo "Post-install script to perform desired tasks after installation..."
+sleep 1

example/example.post-uninstall

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+echo "Post-uninstall script to perform a cleanup..."
+sleep 2

example/example.pre-install

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+echo "Pre-install script"
+sleep 1
+ehco "Check for dependencies or pre-requisites..."
+sleep 2
+echo "If exit code if non-zero the installation will not continue."
+sleep 2

example/example.pre-uninstall

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+echo "Pre-uninstall to ask for additional confirmation or warn about outcome..."
+sleep 2