initial commit with users consolidation feature

The url is users/merge
merging of accounts for some tables

The merger has been down for tables that User id as a foreign key
only for 'creator_id' and 'updater_id'.
implemented the merger of two accounts for most of the tables
refactored some of the code to be more condensed and not repetitive.
implemented the users/merge account consolidation feature.
finished implementing users/merge

I have added the link to the page to the top of users index with
a merge icon. Furthermore I have modified the jQuery for the page
to show the process of searching for users so that users know that
the server is not just hanging if no results are returned.
removed alert from jQuery