grim/purple-objects-docbook

cleaned up some output and made the targets that depend on specific sheets depend on the specific sheet
<?xml version="1.0" encoding="UTF-8"?>
<hierarchy>
<objects>
<object name="GObject" type="abstract"/>
<object name="PurpleObject" type="abstract"/>
<object name="PurpleAccount" type="abstract"/>
<object name="PurpleMSNAccount" type="concrete"/>
<object name="PurpleOSCARAccount" type="concrete"/>
<object name="PurpleSILCAccount" type="concrete"/>
<object name="PurpleXMPPAccount" type="concrete"/>
<object name="PurpleYahooAccount" type="concrete"/>
</objects>
<relations>
<relation start="PurpleObject" end="GObject" type="is-a"/>
<relation start="PurpleAccount" end="PurpleObject" type="is-a"/>
<relation start="PurpleMSNAccount" end="PurpleAccount" type="is-a"/>
<relation start="PurpleOSCARAccount" end="PurpleAccount" type="is-a"/>
<relation start="PurpleSILCAccount" end="PurpleAccount" type="is-a"/>
<relation start="PurpleXMPPAccount" end="PurpleAccount" type="is-a"/>
<relation start="PurpleYahooAccount" end="PurpleAccount" type="is-a"/>
</relations>
</hierarchy>
<!--
vi: syntax=xml
-->