SPR-5905: support for inner type references in type references 'T(com.foo.A$B)' or in ctor calls 'new com.foo.A$B()'

SPR-5804: problems with map access if it is the root object; SPR-5847: alternative map referencing strategies: a.b == a[b] == a['b']

[SPR-5640] Updated reference manual regarding new support for marking the test application context as 'dirty' after each test method within a given test class.

[SPR-5640] Added support for marking the test application context as 'dirty' after each test method within a given test class via the new DirtiesContext.classMode() attribute.

SPR-5518: textual alternatives for operators (eq, lt, le, gt, ge, ne, div, mod, not) - removes messy escaping for expressions declared in XML.

[SPR-4702] Explicit tests for TestExecutionListener's new beforeTestClass() and afterTestClass()} lifecycle callback methods with TestNG support classes.

[SPR-4702] Explicit tests for TestExecutionListener's new beforeTestClass() and afterTestClass()} lifecycle callback methods.