Added a generic roller function
Combat Roller is a D&D companion Dice Roller app for 5e tabletop games which allows you to define custom actions representing dice rolls. These actions consolidate as many rolls as possible. An attack action for instance, will roll both the attack and damage rolls automatically. It will also automatically double roll crits. The user can also roll all rolls with an advantage/disadvantage modifier, which takes into account the multiple rolls. Combat Roller also takes into account certain class features, like "Brutal Crits" or the play test features of the Brute subclass.
The full, paid, version of the app allows for more definable actions, allows for checks/save rolls, and includes a basic roller.
