Added hook to stop migration if non ported extension found

languages/en_us/Migration.php

@@ -14,11 +14,11 @@ $languageStrings = array(
'LBL_PRIDE_BEING_ASSOCIATED' => 'We take pride in being associated with you.',
'LBL_TALK_TO_US_AT_FORUMS' => 'Have any questions? Find help on Vtiger <a href="http://forums.vtiger.com" target="_blank"> Discussions </a><br>',
'LBL_DISCUSS_WITH_US_AT_BLOGS' => 'To know more about Vtiger follow us our <a href="http://blogs.vtiger.com" target="_blank">Blog</a>',
-	'LBL_CRM_DOCUMENTATION' => 'Vtiger6 Help - <a href="http://wiki.vtiger.com/vtiger6" target="_blank">Documentaion</a> , <a href="http://www.youtube.com/vtiger" target="_blank">Videos</a> <BR>',
+	'LBL_CRM_DOCUMENTATION' => 'Vtiger7 Help - <a href="http://wiki.vtiger.com/vtiger7" target="_blank">Documentaion</a> , <a href="http://www.youtube.com/vtiger" target="_blank">Videos</a> <BR>',
'LBL_THANKS' => 'Thanks for using <b>vtiger CRM</b>',
'LBL_WE_AIM_TO_BE_BEST' => 'We aim to be - simply the best',
'LBL_SPACE_FOR_YOU' => 'Come on over, there is space for you too!',
-	'LBL_MIGRATION_COMPLETED_SUCCESSFULLY' => 'Your vtiger6 migration completed successfully.',
+	'LBL_MIGRATION_COMPLETED_SUCCESSFULLY' => 'Your vtiger7 migration completed successfully.',
'LBL_RELEASE_NOTES' => 'To know what is new in this version, please read <a href="#" target="_blank">Release Notes</a> <br>',
'LBL_WAIT' => 'Please wait ...',
'LBL_INPROGRESS' => 'Migration Inprogress',