updated the MatrixSolver framework
Added license to the MatrixInputActivity class
updated maximum width for input text fields
updated the MatrixSolver imports in the MatrixInputActivity class
Added License, tidied stuff
added underflow handler for the matrix dimension picker seekbar
Modified seekbar underflow handling method
Decided to scale the values (add a constant factor of 2) instead of
doing an if check, it looks better when drawing
Added a dialog display for Matrix operation results
The dialog displays the result of the matrix or the reason why it cannot
be calculated in case it is a singular matrix
Fixed up navigation bug
Made interface changes and fixed minor fencepost errors
updated the role of the MatrixInputActivity in the hierarchy
changed default matrix size from 5 to 4