Prevent deprecation error message

The source :rubygems is deprecated because HTTP requests are insecure.
Updated docs to provide copying example

Provided a simple example of 'copy to plugin directory'.
Merge pull request #2 from wari/patch-2

Updated docs to provide copying example
Merge pull request #3 from wari/patch-1

Prevent deprecation error message
Fixed emoji in Email notifications.
class attribute for img element
bump version number to 0.0.2 for latest fixes

Includes
- class attribute for img element
- Fixed emoji in Email notifications
Merge branch 'paginagmbh'

Conflicts:
	Gemfile
	lib/gemoji_plugin.rb