fixed initial performance test
only require 'test_helper' in page tests

You can use -I test so it will be found when running a single test with ruby
travis: run rake test:everything
also test rendering new network form

it's using the options_for_select_group
do not bother running rcov on travis
some more tests for page creation
exclude all files in gems from rcov
make add_attachement also work with Assets
only page admins may remove attachements