introduced MahApps and created tabs and header
Created Tabs Grids and Headers
Created EstimateVM and Bound Estimate Tasks
Added Task Delete Button
Some cleanup of design
Made the estimate column headers fixed to top
Added task updates

OMG what am i about to do?!?
Task update headers finally working
Fixed the open/save buttons
Fixed update header binding
Made scaling changes awesome
Made much more space for updates
added basic burndown
added distractions to burndown
renaming estimate view model
Added Settings Flyout
made the numbers a bit more realistic
Added Total Worked to estimate
added remaining line series
Add and delete buttons wired up