Setting up dotenv and moving HTTP auth info there

Adding dotenv

Locking down older versions of ActiveSupport and ActiveModel

Explicitely requiring ActiveSupport for Ruby 1.9.3

Setting up MongoDB on TravisCI

Adding .travis.yml

Updating README for versions used

Updating mongo_mapper gem and fixing tests

Updating all gems

Updating Rubygems source and adding Rake to gemfile

Adding .gitignore file

Updating gem versions in Gemfile

Modified requires and tested for Ruby 1.9.2

Removed .bundle directory

Specify use of Ruby 1.8.7