Initial design for the hours summary page.
Added btn-xxs to fit well into the accordion header
Final design for the hours summary page
Minor changes to design
Added database schema for the timesheets
Made memo nullable
Added model for timesheet and updated TA model.
Added Semester selection on top
Made modifications to the design. Added Late label. Added Additional hours field and memo field.
Modified timesheets method to accept semeter and year.
Fixed missing fillable table columns
Changed database schema for timesheets
Finished issue-36. Moved hours to a separate controller. Added controller for timesheet submission.  Added routes to new controllers. Implemented full user interface design to populate from database. Added option to add additional hours with a memo. Added option to view previous semesters.
Merge pull request #42 from andreykul/issue-36

Issue 36 FInished