worked on CRM-12357, fixed generated data
worked on CRM-12357, show bulk mailing activities if they are created.
worked on CRM-12357, fixed pager for mailing listing in mailing tab
worked on CRM-12357, fixed sorting of columns
worked on CRM-12357, implemented getcount api
whitespace fixes
worked on CRM-12357, added contact view option for mailings tab
fixed conflict
Merge pull request #579 from kurund/CRM-12357-final

CRM-12357