move 'current' info to left side of pointer on mainactivity, landscape
update pointer grid background
align "current" and "to destination" to the bottom center of the pointer grid, MainActivity, portrait
add placeholder string to values
align "current" info to the right
center pointer grid to middle of Activity, aligning "current" and "to destination" info to to the center and left and right of the grid
fix layout issues
remove unnecessary tags
fix indentation
add method to get an inverse angle.
add tests for inverseAngle()
add tail to direction pointer