Version argument

@brettweavnet please take a look at the PR. This is for setting the version and the iteration

In the console output below, you can see the `simple_deploy` gem version being installed on line 1, you can see the RPM version on the last line.

### Jenkins prompt when clicking Build Now ###
![image](https://f.cloud.github.com/assets/3271530/1091123/f7cae4f0-1662-11e3-8e38-60ab20eb10d0.png)

### Output from Jenkins console ###
````
ec2-50-18-65-192.us-west-1.compute.amazonaws.com [builder:simple_deploy] Executing: `/opt/intu/simple_deploy/embedded/bin/gem install simple_deploy -n /opt/intu/simple_deploy/bin --no-rdoc --no-ri -v 0.6.6` with cwd=/var/cache/omnibus/src/simple_deploy,timeout=5400,env="RUBYOPT= BUNDLE_BIN_PATH= BUNDLE_GEMFILE= GEM_PATH= GEM_HOME="
ec2-50-18-65-192.us-west-1.compute.amazonaws.com [builder:simple_deploy] /opt/intu/simple_deploy/embedded/bin/gem command succeeded, 103.19942382s
ec2-50-18-65-192.us-west-1.compute.amazonaws.com [builder:simple_deploy] simple_deploy build succeeded, 103.199789741s
ec2-50-18-65-192.us-west-1.compute.amazonaws.com touch /var/cache/omnibus/build/opt_intu_simple_deploy/simple_deploy.manifest
ec2-50-18-65-192.us-west-1.compute.amazonaws.com mkdir -p /var/cache/omnibus/pkg
ec2-50-18-65-192.us-west-1.compute.amazonaws.com [health_check] Executing `find /opt/intu/simple_deploy/ -type f | xargs ldd > ldd.out 2>/dev/null`
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.KmuYWp
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.3KTv2f
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Executing(%install): /bin/sh -e /var/tmp/rpm-tmp.2STJ85
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Processing files: simple_deploy-0.6.6-3.el6.x86_64
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Checking for unpackaged file(s): /usr/lib/rpm/check-files /var/cache/omnibus/pkg/build-rpm-simple_deploy-0.6.6-3.el6.x86_64.rpm/BUILD
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Wrote: /var/cache/omnibus/pkg/build-rpm-simple_deploy-0.6.6-3.el6.x86_64.rpm/SRPMS/simple_deploy-0.6.6-3.el6.src.rpm
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Wrote: /var/cache/omnibus/pkg/build-rpm-simple_deploy-0.6.6-3.el6.x86_64.rpm/RPMS/x86_64/simple_deploy-0.6.6-3.el6.x86_64.rpm
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.DNIxUx
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Created /var/cache/omnibus/pkg/simple_deploy-0.6.6-3.el6.x86_64.rpm
ec2-50-18-65-192.us-west-1.compute.amazonaws.com mkdir -p pkg
ec2-50-18-65-192.us-west-1.compute.amazonaws.com ++ ls -d /var/cache/omnibus/pkg/simple_deploy-0.6.6-3.el6.x86_64.rpm
ec2-50-18-65-192.us-west-1.compute.amazonaws.com + for rpm in '$(ls -d /var/cache/omnibus/pkg/simple_deploy*.rpm)'
ec2-50-18-65-192.us-west-1.compute.amazonaws.com + echo 'Upload /var/cache/omnibus/pkg/simple_deploy-0.6.6-3.el6.x86_64.rpm to s3://intu-omnibus-packages-us-west-1'
ec2-50-18-65-192.us-west-1.compute.amazonaws.com Upload /var/cache/omnibus/pkg/simple_deploy-0.6.6-3.el6.x86_64.rpm to s3://intu-omnibus-packages-us-west-1
```