Update CHANGELOG.TXT for release of 1.70 Release Candidate 2.

CHANGELOG.TXT

@@ -1,8 +1,9 @@
+1.70 (2013-02-25):
   Fixed issue MR-332 - Can't select different tab with one click after disconnecting existing tab
   Fixed issue MR-338 - PuTTYNG crashing on fresh install of mRemoteNG
   Re-enabled PuTTYNG integration enhancements on Windows 8
 
-1.70 (2013-02-22):
+1.70 Release Candidate 1 (2013-02-22):
   Fixed issue MR-183 - Error trying to save connections when using SQL - Invalid column name _parentConstantId
   Fixed issue MR-225 - Tabs do not open in a panel until multiple panels are displayed.
   Fixed issue MR-229 - Integrated PuTTY doesn't work in Windows 8 RP