grim/purple-objects-docbook

updated the title of the conversation hierarchies to be a bit more specific
<?xml version="1.0" encoding="UTF-8"?>
<enumeration name="PurplePluginState">
<item name="PURPLE_PLUGIN_STATE_UNKNOWN" value="-1"/>
<item name="PURPLE_PLUGIN_STATE_ERROR" value="0"/>
<item name="PURPLE_PLUGIN_STATE_LOADED"/>
<item name="PURPLE_PLUGIN_STATE_LOAD_FAILED"/>
<item name="PURPLE_PLUGIN_STATE_NOT_LOADED"/>
<item name="PURPLE_PLUGIN_STATES"/>
</enumeration>