InvalidArgumentException - Identifier "env" is not defined

## Description

When trying to create/provision an instance, we get an error that looks like this:
![screen shot 2014-08-21 at 8 07 33 am](https://cloud.githubusercontent.com/assets/819455/3998054/ee7ac140-2944-11e4-9cbe-d85b30a6d9f7.png)
We believe we have identified that the cause is this line:
https://github.com/synapsestudios/synapse-base/blob/92f7f5eaea034e532744a7f20d735aae4dc71ae4/src/Synapse/Install/InstallServiceProvider.php#L48
where `env` should instead say `environment`

## Details
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- Expected Result: 
- Actual Result: 
- Steps to Reproduce: 
    1. STEPS