Add support for plantuml/graphviz diagrams via the plantuml plugin

Created by: vtexier

Readme updated with documentation about the plugin Add an architecture page in the wiki to show an example

content/pages/wiki/duniter/architecture.md

+Title: Architecture
+Order: 10
+Date: 2017-10-09
+Slug: architecture
+Authors: vit
+
+## Clients network architecture
+
+Here is a glimpse of the architecture of Duniter between one server and clients.
+
+::uml:: format="svg" alt="clients architecture"
+
+@startuml
+
+title Clients network architecture
+
+node "Duniter" {
+
+    interface "HTTP" as HTTP_duniter
+
+    HTTP_duniter - [Basic Merkle Api]
+}
+
+database "Elastic Search" as ES {
+
+    interface "HTTP" as HTTP_ES
+
+    frame "Duniter4j Plugin" {
+
+        [Sync] -- HTTP_duniter
+    }
+
+    [Members Profiles Index]
+    [Companies Registry Index]
+    [Market Place Index]
+}
+
+package "Duniter Desktop" {
+
+    interface "client BMA" as client_duniter_desktop
+
+    client_duniter_desktop --- HTTP_duniter
+}
+
+package "Remuniter" {
+
+    interface "client BMA" as client_remuniter
+
+    client_remuniter --- HTTP_duniter
+}
+
+
+package "Cesium" {
+
+    interface "client BMA" as client_bma
+
+    frame "ES Data Store Plugin" {
+        interface "client ES" as client_es
+
+        [Members Profiles]
+        [Companies Registry]
+        [Market Place]
+        client_es --- HTTP_ES
+    }
+
+    client_bma -- HTTP_duniter
+
+}
+
+package "Duniter Android App" {
+
+    frame "Duniter4j API" {
+        interface "client BMA" as client_android_bma
+
+        client_android_bma --- HTTP_duniter
+    }
+}
+
+package "Sakia" {
+
+    frame "Duniter Python API" {
+        interface "client BMA" as client_sakia
+
+        client_sakia --- HTTP_duniter
+    }
+}
+
+@enduml
+
+::end-uml::