Inital by-type split

Split type.class from CssTypeSelector to CssCompositeSelector, probably support type#id.class selectors

Apply review comments, refactor css-selectors internally

Applied refactoring, all tests pass, button does not notify changes

Add tests for the css selectors parser.

Added tests for css-selectors

Added basic implementation of mayMatch and changeMap for css match state

Implemented TKUnit.assertDeepEqual to check key and key/values in Map and Set

Watch for property and pseudoClass changes

Add one child group test

Add typings for animations

Added mechanism to enable/disable listeners for pseudo classes

Count listeners instead of checking handlers, reverse subscription and unsubscription

tns-core-modules/ui/styling/css-selector-parser.d.ts

@@ -0,0 +1,39 @@
+//@private
+declare module "ui/styling/css-selector-parser" {
+    export interface SimpleSelector {
+        pos: number;
+        type: "" | "*" | "#" | "." | ":" | "[]";
+        comb?: "+" | "~" | ">" | " ";
+    }
+    export interface SimpleIdentifierSelector extends SimpleSelector {
+        ident: string;
+    }
+    export interface UniversalSelector extends SimpleSelector {
+        type: "*";
+    }
+    export interface TypeSelector extends SimpleIdentifierSelector {
+        type: "";
+    }
+    export interface ClassSelector extends SimpleIdentifierSelector {
+        type: ".";
+    }
+    export interface IdSelector extends SimpleIdentifierSelector {
+        type: "#";
+    }
+    export interface PseudoClassSelector extends SimpleIdentifierSelector {
+        type: ":";
+    }
+    export interface AttributeSelector extends SimpleSelector {
+        type: "[]";
+        prop: string;
+        test?: "=" | "^=" | "$=" | "*=" | "=" | "~=" | "|=";
+        value?: string;
+    }
+    export function isUniversal(sel: SimpleSelector): sel is UniversalSelector;
+    export function isType(sel: SimpleSelector): sel is TypeSelector;
+    export function isClass(sel: SimpleSelector): sel is ClassSelector;
+    export function isId(sel: SimpleSelector): sel is IdSelector;
+    export function isPseudo(sel: SimpleSelector): sel is PseudoClassSelector;
+    export function isAttribute(sel: SimpleSelector): sel is AttributeSelector;
+    export function parse(selector: string): SimpleSelector[];
+}