Create individual ICS files and add to webpage

For people who don't want to import every OpenStack meeting, allow them
to import individual ICS meeting files as needed.

 * Generate individual ICS meeting files for each meeting
 * Update the template to provide a link for each ICS meeting file

Change-Id: Ie8847482d2b9df95b684ce4f743aecf2dc7a7021

meetingindex.jinja

@@ -42,6 +42,10 @@ use in your favorite calendaring app:</p>
 <a href="http://www.timeanddate.com/worldclock/fixedtime.html?hour={{ schedule.utc[:2] }}&amp;min={{ schedule.utc[2:] }}&amp;sec=0">{{ schedule.utc }} UTC</a>
 in #{{ schedule.irc }}</li>
 {% endfor %}
+<li>ICS file of meeting, for use in your favorite calendaring app:</li>
+<ul>
+    <li><a href="meetings/{{ meeting.outfile }}">iCalendar Meeting</a><br/></li>
+</ul>
 <li>Chair (to contact for more information): {{ meeting.chair }}</li>
 <li>{{ meeting.description|urlize }}</li>
 {% if meeting.extras.meeting_id %}

tox.ini

@@ -14,8 +14,9 @@ commands = {posargs}
 
 [testenv:ical]
 commands =
-    mkdir -p output
+    mkdir -p output/meetings
     yaml2ical -n "OpenStack Meetings" \
         -d "Meeting schedule for the OpenStack projects" \
         -y meetings -o output/irc-meetings.ical \
         -t meetingindex.jinja -w output/index.html -f
+    yaml2ical -y meetings -i output/meetings/ -f