Ready to implement multiple cutscenes/endings;

Re-jigged interrogation maths;

the game can end now

 - New object in the level called "ResolutionList" that stores the ID's of the 'Exact Match' solutions.
 - New Script called "CaseResult" that handles the storage of the resolutions and the math to calculate the score.
 - Updated the EvidenceHandler script to have the following functions:
     * Add a new piece of Evidence to the end of the timeline;
     * Add a new piece of Evidence to somewhere in the middle of the Timeline;