Merge pull request #389 from lev-kuznetsov/master

Rest API for selections
Added previous analysis API call.
Merge pull request #392 from lev-kuznetsov/master

Fixes HCL root rest API
Merge remote-tracking branch 'dfci-mev/master' into working-branch
Added fixes to API calls for clustering.
Merge pull request #393 from jfarid27/working-branch

Working branch
Merge pull request #398 from lev-kuznetsov/master

Working HCL REST API
Updated API call to proper http request. fixes #396.
Merge pull request #400 from lev-kuznetsov/master

Fixes #399
Removed HCL algorithms and metrics fetch. fixes #394.
Merge pull request #401 from jfarid27/bug-fixes

Bug fixes
Added random string generator.
Fixed error in random string generator
Added radial heatmap trees. fixes #395.
Minor asthetic changes.
Merge pull request #404 from jfarid27/fix-issue-395

Fix issue 395
Added Annotations maneu with 'Column Annotations' link to OpenRefine
Merge pull request #405 from apartensky/baylie-20131211-mev-annotations-menu-link

Added Annotations maneu with 'Column Annotations' link to OpenRefine
Fixed some radial tree errors.
Merge pull request #406 from jfarid27/fix-issue-395

Fixed some radial tree errors.