bug 1066058; add Support Reason API crashstorage type

*Preamble: This PR is primarily submitted for discussion purposes (I expect more work to be necessary).*

This adds the `SupportReasonAPIStorage` class which is a sub-class of `BotoS3CrashStorage`; functionally speaking, the former is basically a *highly lossy* implementation of the latter.

cc @twobraids 
I'm just overwriting the function of the same name from `BotoS3CrashStorage()` which uses the decorator in the same context.  Also, if the decorator is removed, an error condition results:
```
(socorro-virtualenv)[vagrant@localhost socorro]$ nosetests socorro/unittest/external/ceph/test_crashstorage.py
...........E....
======================================================================
ERROR: test_save_processed_support_reason (socorro.unittest.external.ceph.test_crashstorage.TestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/vagrant/socorro/socorro/unittest/external/ceph/test_crashstorage.py", line 379, in test_save_processed_support_reason
    boto_s3_store.save_processed(report)
  File "/home/vagrant/socorro/socorro/external/ceph/crashstorage.py", line 156, in save_processed
    self.transaction(self._do_save_processed, processed_crash)
  File "/home/vagrant/socorro/socorro/database/transaction_executor.py", line 53, in __call__
    raise
  File "/usr/lib64/python2.6/contextlib.py", line 34, in __exit__
    self.gen.throw(type, value, traceback)
  File "/home/vagrant/socorro/socorro/external/ceph/crashstorage.py", line 438, in __call__
    yield self
  File "/home/vagrant/socorro/socorro/database/transaction_executor.py", line 52, in __call__
    self.db_conn_context_source.force_reconnect()
  File "/home/vagrant/socorro/socorro/external/ceph/crashstorage.py", line 453, in force_reconnect
    del self.connection
AttributeError: connection

----------------------------------------------------------------------
Ran 16 tests in 0.025s

FAILED (errors=1)
```