Merge pull request #776 from dimitarp/next

[FIX] Maven: fixed SCM developer connection URL
[MOD] aligned naming of AtomicUpdateList with thesis -> AtomicUpdateCache
[MOD] AUC stream based population
[MOD] AUC distinction between structural + value updates
[MOD] reduced memory consumption of value updates
[ADD] Lazy Replace (not yet activated)
[ADD] merging of atomic updates
[MOD] reduced memory consumption + speedup of text node adjacency resolution
..
[MIN] minor rewritings
[MOD] Commands, Set: Type-safe option assignment (thx to Dimitar)
[ADD] Convenience operator "!!" as alternative for transform expression: 

* example:
  for $e in //item[@status ne 'up-to-date'] 
  let $c := $e !! insert node <sub/> into .
  return element updated { $c }
* motivated in: https://www.w3.org/Bugs/Public/show_bug.cgi?id=23643
[ADD] XQuery, Updates: last step of path may now be updating.

* Discussion:
  https://www.w3.org/Bugs/Public/show_bug.cgi?id=23644

* Examples:
  //item/(insert text { 'checked' } into .)