CRM-14146 - conditionally change contribution button text  based on whether confirm page is skipped.

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* CRM-14146: Button on contribution page should be "Confirm Contribution"
  http://issues.civicrm.org/jira/browse/CRM-14146
Merge pull request #2442 from davecivicrm/CRM-14146

CRM-14146 - conditionally change contribution button text  based on whet...