Restricts service account usernames to charnames

* Forms now show a character selection box
  * Once created, user is sent to a template with a generated password
  * Will not display a service if a account already exists on it.

templates/sso/serviceaccount_created.html

@@ -0,0 +1,29 @@
+{% extends "base.html" %}
+
+{% if error %}
+{% block title %}Service Account Error{% endblock %}
+{% else %}
+{% block title %}Service Account{% endblock %}
+{% endif %}
+
+{% block content %}
+{% if error %}
+<div style="border: 1px solid #FF0000; background: #FF7D7D; width: 100%; text-align: center;">
+<b>Error:</b> Your account has not been created. Either you already have a user on this service or a error has occured. If you think 
+this is incorrect please raise a bug on the tracker.
+</div>
+{% else %}
+<p>Your account on {{ account.service }} has been created. Your login details are as follows:</p>
+
+<table>
+<tr><td>Username:</td><td>{{ account.service_uid }}</td></tr>
+<tr><td>Password:</td><td>{{ account.password }}</td></tr>
+</table>
+
+<p><b>Warning:</b> You password is random, please either note it down or once logged into the service change it to something you 
+will remember. Service passwords are not stored in the Auth system.</p>
+
+<p><a href="/profile">Return to your profile page</a></p>
+{% endif %}
+
+{% endblock %}