The gem doesn't work unless the output directory is an absolute path

[adamvduke]

push_package --website-json=./push_package/website.json --iconset=./push_package/icon.iconset/ --certificate=/Users/adamd/Dropbox/SymmetricInfinity/ZeroPush/website-push-test-one.p12 --output-dir=.
/Users/adamd/.rvm/gems/ruby-1.9.3-p392@zeropush-rails/gems/push_package-0.0.3/lib/push_package.rb:62:in `initialize': No such file or directory - ./pushPackage.zip (Errno::ENOENT)
from /Users/adamd/.rvm/gems/ruby-1.9.3-p392@zeropush-rails/gems/push_package-0.0.3/lib/push_package.rb:62:in `open'
from /Users/adamd/.rvm/gems/ruby-1.9.3-p392@zeropush-rails/gems/push_package-0.0.3/lib/push_package.rb:62:in `save'
from /Users/adamd/.rvm/gems/ruby-1.9.3-p392@zeropush-rails/gems/push_package-0.0.3/bin/push_package:50:in `<top (required)>'
from /Users/adamd/.rvm/gems/ruby-1.9.3-p392@zeropush-rails/bin/push_package:23:in `load'
from /Users/adamd/.rvm/gems/ruby-1.9.3-p392@zeropush-rails/bin/push_package:23:in `<main>'