Add dist/ directory to repo to correspond development guide.

http://docs.grafana.org/plugins/development/

dist/README.md

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+## Zabbix plugin for Grafana
+Zabbix plugin allows to show different type of data from [Zabbix](http://www.zabbix.com/) 
+monitoring system.
+
+### Live Demo
+
+Check out the [live demo](http://play.grafana-zabbix.org/) with dashboard examples.
+
+### Features
+
+#### Flexible metric editor
+ * Regex-based metric filtering
+ * Client-side data processing functions
+ * Template variables support
+
+#### Templated dashboards support
+Group, host, application or item names can be replaced with a template variable. This allows you to create generic dashboards that can quickly be changed to show stats for a specific cluster, server or application.
+
+#### Annotations support
+ * Display zabbix events on graphs
+ * Show acknowledges for problems
+
+#### Triggers panel
+Panel for showing Zabbix triggers (like Last 20 issues) with some customizable features.