Add blank Task Manager module with comments

Note: this commit also includes the controller and model packages from
PostBoard. They are not currently utilized.
Add the manifest.txt needed to build the TaskManager module

This file should have been included in the previous commit.
Add some test text to panel
Merge branch 'develop' into task-manager-module
Merge pull request #2 from R2-Team2/task-manager-module

Add basic Task Manager module