Fixed bug with missing SSLError in imports

  File "/usr/lib/python2.6/dist-packages/apns.py", line 153, in _connect
    except SSLError, ex:
NameError: global name 'SSLError' is not defined
Merge pull request #62 from ogreser/fix/SSLError

Fixed bug with missing SSLError in imports
Fix travis user name
Remove python 2.5 from travis yml
Merge pull request #67 from hagino3000/fix_travis_yml

Travis no longer support Python 2.5
Merge pull request #66 from hagino3000/fix_travis_user

Fix travis user name to current owner
Add enhanced message and its corresponding error-handling, resent
mechanism. Fix #61.
Remove unused logger.
Fix typo