Initial support for network acls
get_all_network_acls now works properly
Removed extraneous comments.
Added support for associating and disassociating network ACLs and
subnets.
Added supoprt for replacing network acl entries.
Now properly populates NetworkAclEntry class with icmp & port range
options.
Removed unnecessary import of NetworkAclEntry.
Add MinAdjustmentType for autoscaling.

When policy_type is PercentChangeInCapacity, allows values of
min_adjustment_type, which set the AWS MinAdjustmentType value for
autoscaling policies.
Add mobile push API
Add unit tests for publish operation
Add target_arn to publish method in SNS client
Added public IP in VPC support to EC2.
PEP8 fixes for EC2 MinAdjustmentStep
Add unit tests for EC2 auto scaling policy MinAdjustmentStep
Added a failing test for set changes in DDBv2.
Altering how state tracking of ``Item`` data works in DDBv2.
update cacerts from mozilla.org

Used mk-ca-bundle.pl locally to generate a recent cacerts.txt file that
fixes https certificate validation for OSX 10.8x. These certs were built
with:

$ perl mk-ca-bundle.pl -w 64 boto/cacerts/cacerts.txt

fixes boto/boto#1535
closes jtriley/StarCluster#267
Added a failing test for CloudSearch's Layer2.
fix for https://github.com/boto/boto/issues/1629
Only include MinAdjustmentStep as a parameter if it has been set in order to prevent changing existing behavior; updated unit tests to show this behavior.
-w flag never actually checked s3 for a file's existence. Always refused to upload.