refactor(API): Move org.loadui.testfx.framework.robot to org.testfx.api.
refactor(API): Rename FxRobotImpl to FxRobot and introduce FxRobotInterface.
refactor(API): Introduce FxRobotContext.
fix(API): Add license headers.
refactor(API): Initialize pointPosition explicitly.
Merge pull request #171 from hastebrot/refactor-fxrobot

refactor(API): Move FxRobot to org.testfx.api.