- Check plugin key against all installed plugins
- Reword some error messages
* VersionComparator: add '-' and '_' as valid separators
to better support plugin and java version checking
* configclients.jsp: Use new WebAppStarter so webapps that are
started later also get the temp dir, password, and classpath
configuration just like if they were started at the beginning
* configupdate.jsp: Delay after checking for update so the
summary bar will have buttons.