(feat) Assert, Matcher: Improve type-aware matchers.

[hastebrot]

cc: #193

[hastebrot]

Examples for former Commons.hasText(String text), hasText(Matcher<String> matcher) and nodeLabeledBy(String labelQuery):

FxAssert.verifyThat(".label", NodeMatchers.hasText("Move Up"));
FxAssert.verifyThat(".label", NodeMatchers.hasText(endsWith("Up")));

nodes(hasText("Move Up")).queryFirst();
nodes(hasText(endsWith("Up"))).queryFirst();
nodes(".label").select(hasText("Move Up")).queryFirst();

clickOn(hasText("Move Up"));
clickOn(hasText(endsWith("Up")));

[hastebrot]

Examples for former ContainsNodesMatcher.contains(String domQuery) and contains(int numberOf, String domQuery):

FxAssert.verifyThat("#toolbar", NodeMatchers.hasChild("#saveButton"));
FxAssert.verifyThat("#toolbar", NodeMatchers.hasChildren(3, ".button"));

FxAssert.verifyThat("#toolbar", ParentMatchers.hasChild());
FxAssert.verifyThat("#toolbar", ParentMatchers.hasChildren(9));