Add new site extension hierarchy
Merge pull request #955 from shenrie/master

Fixed resource policy test and added log statements to debug builder issue
bump ion-defs
Merge branch 'master' of github.com:ooici/coi-services
remove unused functions
Merge pull request #954 from ifreecarve/2013-04-17_site_hierarchy

Add new site extension hierarchy
Update pyon to unpin libraries
Unpin simplejson
Remove extraneous requests
support for passing precision to Viz client
Merge branch 'master' of github.com:ooici/coi-services
Refactor the prepare resource operations