add init and readme

init.rb

@@ -0,0 +1,24 @@
+require 'redmine'
+
+require_dependency 'redmine_mattermost/listener'
+
+Redmine::Plugin.register :redmine_mattermost do
+	name 'Redmine Mattermost'
+	author 'AltSol'
+	url 'https://github.com/altsol/redmine_mattermost'
+	author_url 'http://altsol.gr'
+	description 'Mattermost chat integration'
+	version '0.1'
+
+	requires_redmine :version_or_higher => '0.8.0'
+
+	settings \
+		:default => {
+			'callback_url' => 'http://example.com/callback/',
+			'channel' => nil,
+			'icon' => 'https://raw.githubusercontent.com/altsol/redmine_mattermost/assets/icon.png',
+			'username' => 'redmine',
+			'display_watchers' => 'no'
+		},
+		:partial => 'settings/mattermost_settings'
+end