* xover.init.Observer - checks for existence of added and removed nodes

* xover.listener.on(['pageshow', 'popstate'] - added a filter to render sections only for seed
* xover.session.getter - added return for functions
* xover.site.setter - fixed hashtag bug
* xover.stores.# - added fallback for sites without # route
* xover.xml.observer
  - reallocated section rendering
  - disabled function exit on change event defaultPrevented
* Node.prototype.selector - bug fixed for SVGs
* XMLDocument.prototype.render
  - xo-scope and xo-source won't inherit from target anymore
  - target's document and context are no longer attached to "this" and "data" (they are attached to new_node's children
* xover.xml.combine
  - refactored staticAttributes
  - reallocated named_slots to fill values with source (it's important to do it here after copying attribtues)
  - refactored conditions for replaceWith block
  - refacotred conditions for setAttributeNode block
* xover.Store - refactored document render call