CLOG-114 update <parent> and pom version to 11-SNAPSHOT

Adrian--pointing this PR at clogdash master but before you consider merging it, I recommend creating a clog sakai-10 branch first.  I've also updated the version from 0.2-SNAPSHOT to 11-SNAPSHOT.  This aligns clogdash master with Sakai trunk version practices.  However, if you would rather have clog master versioned 0.3-SNAPSHOT I'll happily adjust the PR.