switch to 6.2 version as we are going to have new functionality
removing ignoreDirectoryName option from PackageDeclarationCheck

This option duplicates compilation error and has no sense to be run
on successfully compiled java sources.
chekstyle is switching to java7
minor links fixes
maven-surefire-plugin config updated to pass UTs on java7, there was error like 'Expecting a stackmap frame at branch target 108'
jxr plugin was added to have links sources
Avoid Escape Unicode Characters Check compilable UT input
Covariant Equals Check compilable UT inputs
Annotation Location Check compilable UT inputs
Operator Wrap Check compilable UT input
Right Curly Check compilable UT inputs
Empty Block Check compilable UT input
Input Whitespace (is used in many UTs) now compilable
Missing Deprecated Check compilable UT inputs
Package Annotation Check compilbale UT input
Modifier Order Check, inputs with java8 parts are in resources-noncompilable folder