replace action menu images and edit text to use new names

This is based on CRM-16467

Images to change:
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/img/Search%20Action.PNG
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/img/Groups&tags_actions%20Update.png
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/img/CiviCRM_update-CiviCore-ExportFromSearch-en.png
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/img/Batch%20Update%20Contribution%20Via%20Profile.png
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/img/advanced%20search%20schedule%20mass%20mailing.png
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/img/CiviCRM_SMS_sending-by-advanced-search.png
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/img/Batch%20Update%20Contribution%20Via%20Profile.png

and perhaps
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/img/petition_signatures_email.png

and missing image (../img/CiviCRM_contributions_sendreceipts.png) in Manual receipts and thank you letters.

Text to update will be near images and also:
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/organising-your-data/relationships/

http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/organising-your-data/profiles/ (batch update via profiles)
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/events/keeping-track-of-events-and-participants/
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/membership/finding-and-viewing-memberships/
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/email/set-up/ (actions associated with smart group)
http://civicrm-user-guide-rtfd.readthedocs.org/en/latest/email/everyday-tasks/