Contact Merge Page Parameters

Closes #21
Ability to associate merge page with Contact list views, and pass
selected contacts in via standardsetcontroller functionality.
Ability to pass search term as a parameter, e.g.
&srch=James
Ability to pass list of Ids parameter, e.g.
&mergeIds=003000000000001,003000000000002,003000000000003
Also:
Show appropriate section header when page loaded without clicking tab