move remaining methods from Tool::Align::Utils to Core::Node::Aligned

[michnov]

Treex::Tool::Align::Utils remains heterogenous with:

• methods add_aligned_node and aligned_transitively that might be also included in Treex::Core::Node::Aligned but I was lazy to move them, refactor their calls and write documentation and tests for them :)
  • I would rather leave fixing it for later.
• methods aligned_robust and access_* used for rule-based alignment of coreferential expressions