* Fixed import statement

* Added missing variable initialization

* added gene annotation passing for targeted sequencing

* added gene annotation passing for targeted sequencing

* Removed erroneous column

* Refactored how samples are merged, updated comments

* Added missing import

* syntax bug fix

* bug fix

* update to wildcard for cell metric files

* bug with incorrect param to combine_cell_metrics function


Former-commit-id: bab6e6e210361c4d89933bf24bcbe05916cf572f