ENH: context menu for integrating clinical data from tcga added
Fix: fix the crash in getting clinical data and some code refactoring for clinical data popup class
ENH: added icon Patient IDs with clinical data
ENH: Added icons to the clinical data popup and also TCIA browser
Merge pull request #21 from QIICR/20-integrate-clinical-data-from-tcga

20 integrate clinical data from tcga