#4 Fix for bug #67

[Fig Mistwood]

This patch fixes bug #67 (Loop Out input error). The valueChanged signal was being used, so the input value was being checked against maximum and minimum bounds with every keystroke. This caused problems when the user wanted to input multiple-digit numbers. By using the editingFinished signal instead, the new value is not processed until either the user presses their "enter" key or the spin box loses focus.