Merge pull request #58 from andhieka/working

Solved Issues #49 and #50 - Revamping TaskManager
Marking and unmarking of Task (not parsed yet)
Debugged Loading and Saving in TaskWriter. Debugged UI
Merge pull request #59 from mikelimantara/working

Marking and unmarking of Task (not parsed yet)
Merged andhieka-master with main-master