Use subnet group for param, not vpc securitygroup
Add support for Equals function and Condition.

Equals and Condition are often used to conditionally
build resources.
Merge branch 'fix-rds-vpc-example' of https://github.com/timmow/troposphere into timmow-fix-rds-vpc-example
Update test output for RDS_VPC
Merge pull request #66 from kernelwaste/master

Add support for Equals function and Condition.
Merge pull request #67 from craigbruce/master

added ELB CrossZone test & Access logs
Print pep8 version for travis runs
Fix pep8 error (due to pep8 1.5.1 change)
Minor pep8 E251 fixes in 3 example files
Fix resource.name backward compatibility regression

Changes around 'name' atrributes were needed of the OpenStack feature.
This fix restores the use of 'resource.name' for non-OpenStack usage.
Revert some of the name->title changes
Tweaked a few integer validation messages

* Added exception message to positive_integer validation
* Take advantage of "integer" method for int() casting
* Added exception message to network_port range validation
added support for more condition functions
Catch up on changes
Allow Ref() in VPNGatewayRoutePropagation RouteTableIds list

This fixes #73 a different way than the pull request.
add OpsWorks properties and resources
Update for added OpsWorks support
add new property MetricsCollection

Signed-off-by: Stephen Gran <stephen.gran@piksel.com>
Instead of just list for MetricsCollection, use [MetricsCollection]
Merge branch 'sgran-asg_metrics_collection'