Ohif 168 proper error handling (#111)

* Adding a better error handling for DICOMWeb getJson method

* Adding a better error handling for DICOMWeb getBulkData method

* Fixinf some typos. Using console.error to log errors

* Better error handling for DIMSE connections

* Using meteor error in StudyListSearch to better display same error in the client

* Using Meteor.Error for a better pattern. Added an error message in the study list. created connection error types to DICOMWeb connection errors

* Changing error types for server connection. Added better errors for DIMSE server on sockets

* Improving viewer response to error being throw when not finding server to display studies

* OHIF-168: adding catches clauses for retrieveStudyMetada method

* OHIF-168: fixing typo in DIMSE.js

* OHIF-168: setting the session variable  to false when starting a new studylist search

* OHIF-168: Using OHIF.log instead of console

* OHIF-168: removing parsing into string for OHIF.log in Connection.js

* OHIF-168: improving error message visibility in study viewer

Packages/ohif-viewerbase/client/components/viewer/studyTimepointBrowser/studyTimepointStudy.js

@@ -117,6 +117,11 @@ Template.studyTimepointStudy.events({
                         $studies.trigger('loadEnded');
                         instance.select(isQuickSwitch);
                     }, 1);
+                }).catch(error => {
+                    OHIF.log.error(`There was an error trying to retrieve the study\'s metadata for studyInstanceUid: ${studyInstanceUid}`);
+                    OHIF.log.error(error.stack);
+        
+                    OHIF.log.trace();
                 });
             } else {
                 studyData.seriesList = alreadyLoaded.seriesList;