Enabling to merge only single part
URI merge specs

Added 3 new specs to URI for merge of query and fragment values

http://jsfiddle.net/7Ned3/
Merge: URI - Enabling to merge only single part #1089

closes #1089, closes #1210, fixes #1103

URI merging of 'fragment' was not working as described in docs. @mbirtwell provided a jsFiddle example and 3 new Specs (http://jsfiddle.net/7Ned3/) were added to the code fix suggested by #1089

* pr1089:
  URI merge specs
  Enabling to merge only single part