MigrScripts: escape apostrophe in email address

Hi,

I have hit an edge-case where a user has an apostrophe in the email address.

Previously, there was code dropping the apostrophe from subject full name.

This commit introduces proper escaping of the apostrophe (as double apostrophe) - and does it both for the subject email address and the full name.  (Plus at another location in Contacts handling).

Cheers,
Vlad