Various fixes and misc cleanup post-merge of pull requests 122 and 126
Still need purl.js for landing pages that pull in the ‘LandingPage’ Angular module.
Better handling of loading indicators on select landing pages.
GUI-172: Display loading indicator for refresh icon.
Optimize snapshots page to avoid a horrendous number of CLC fetches.
Minor tweaks to loading indicators on landing pages.
Fix unit tests.
Merge pull request #132 from eucalyptus/refresh_fixes

Various fixes and misc cleanup post-merge of pull requests 122 and 126