Removed environment from travis.yml

Signed-off-by: 5Ub-Z3r0 <bitbucket@nikorasu.net>
Re-added rake, moved rspec to spec

Signed-off-by: 5Ub-Z3r0 <bitbucket@nikorasu.net>
Added rspec-rails to the development gemfile to make travis-ci test pass

Signed-off-by: 5Ub-Z3r0 <bitbucket@nikorasu.net>