Spin.js definitions and tests added

Definitions/spin-1.2.d.ts

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+// Type definitions for Spin.js 1.2
+// Project: http://fgnass.github.com/spin.js/
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+interface SpinnerOptions {
+    lines?: number; // The number of lines to draw
+    length?: number; // The length of each line
+    width?: number;  // The line thickness
+    radius?: number; // The radius of the inner circle
+    corners?: number; // Corner roundness (0..1)
+    rotate?: number; // The rotation offset
+    color?: string; // #rgb or #rrggbb
+    speed?: number; // Rounds per second
+    trail?: number; // Afterglow percentage
+    shadow?: bool; // Whether to render a shadow
+    hwaccel?: bool; // Whether to use hardware acceleration
+    className?: string; // The CSS class to assign to the spinner
+    zIndex?: number; // The z-index (defaults to 2000000000)
+    top?: string; // Top position relative to parent in px
+    left?: string; // Left position relative to parent in px
+}
+
+
+class Spinner {
+    constructor (options?: SpinnerOptions);
+    spin(target?: any);
+    stop();
+    lines(el, o);
+    opacity(el, i, val);
+}