update get-involved and remove the bounties

i2p2www/pages/global/bounty.html

-{% extends "global/layout.html" %}
-{% block content %}
-<!-- {% block donatename %}{% endblock %} -->
-<div id="bounty">
-
-<div class="details">
-{% block bountydetails %}{% endblock %}
-</div>
-
-<div class="judge">
-{% block bountyjudge %}{% endblock %}
-</div>
-
-{% block bountynotesouter %}
-<div class="notes">
-Note:
-<ul>
-{% block bountynotes %}
-<li>{% trans -%}
-To claim the bounty the author must not be paid by other organizations
-or teams for this work (e.g. GSoC students are not valid).
-{%- endtrans %}</li>
-{% endblock %}
-</ul>
-</div>
-{% endblock %}
-
-<div class="donate">
-<p><i>{% trans donate=site_url('get-involved/donate'), donatename=self.donatename() -%}
-Bounty amounts may be increased by further donations.  Do
-you think these are important? <a href="{{ donate }}">Add in your donation</a>, 
-marking the amount for the {{ donatename }} bounty!
-{%- endtrans %}</i></p>
-</div>
-
-</div>
-{% endblock %}
-