Merge pull request #51 from broadinstitute/post-release-fixes

remove editing ability for pre-existing collection information.
Update README.md
Filter out DU and Additional Consent records from general searches.
Merge pull request #53 from broadinstitute/post-release-fixes

Filter out DU and Additional Consent records from general searches.
Remove temporary nav links.
Fix linking to existing consent group w/o samples.
Merge pull request #55 from broadinstitute/post-release-fixes

More post-release bug fixes.
Turn down BSP logging - no need to see the response.
Merge pull request #57 from broadinstitute/post-release-fixes

Turn down BSP logging - no need to see the response.
Merge branch 'master' into amendments