Adding README describing YAML format

Copy the YAML format description part of gerrit-powered-agenda
README.rst over to the split repository.

README.rst

@@ -0,0 +1,77 @@
+==================
+OpenStack Meetings
+==================
+
+This project aims to provide an easier way to manage OpenStack team meetings.
+Currently, each team's meeting time and agenda are listed at:
+
+  https://wiki.openstack.org/wiki/Meetings
+
+This project replaces each meeting with well-defined YAML files.
+
+
+YAML Meeting File Format
+========================
+
+Each meeting consists of:
+
+* ``project``: the name of the project
+* ``schedule``: a list of schedule each consisting of
+
+  * ``time``: time string in UTC
+  * ``day``: the day of week the meeting takes place
+  * ``irc``: the irc room in which the meeting is held
+  * ``frequency``: frequent occurrence of the meeting
+* ``chair``: name of the meeting's chair
+* ``description``: a paragraph description about the meeting
+
+The file name should be a lower-cased, hyphenated version of the meeting name,
+ending with ``.yaml`` . For example, ``Keystone team meeting`` should be
+saved under ``keystone-team-meeting.yaml``.
+
+Example
+-------
+
+This is an example for the yaml meeting for Nova team meeting.  The whole file
+will be import into Python as a dictionary.
+
+* The project name is shown below.
+
+  ::
+
+    project:  Nova Team Meeting
+
+* The schedule is a list of dictionaries each consisting of `time` in UTC,
+  `day` of the week, the `irc` meeting room, and the `frequency` of the
+  meeting. Options for the `frequency` are `weekly`, `biweekly-even`, and
+  `biweekly-odd` at the moment.
+
+  ::
+
+    schedule:
+        - time:       '1400'
+          day:        Thursday
+          irc:        openstack-meeting-alt
+          frequency:  biweekly-even
+
+        - time:       '2100'
+          day:        Thursday
+          irc:        openstack-meeting
+          frequency:  biweekly-odd
+
+* The chair is just a one liner. The might be left empty if there is not a
+  chair.
+
+  ::
+
+    chair:  Russell Bryant
+
+* The project description is as follows.  Use `>` for paragraphs where new
+  lines are folded, or `|` for paragraphs where new lines are preserved.
+
+  ::
+
+    description:  >
+        This meeting is a weekly gathering of developers working on OpenStack.
+        Compute (Nova). We cover topics such as release planning and status,
+        bugs, reviews, and other current topics worthy of real-time discussion.