Added initial tests

I've added travis - get a test badge in the readme:
* make an account at https://travis-ci.org/
* enable the collection2 repo
* add the build image to the readme *(right click on the build image in
travis to get the md - takes awhile until tests are run - you'll get an
email)*

This is just initial tests - guess all operations should be tested -
for now `insert` is added, but `update` would be next

I speculated on making a version of collection2 without "passthrough" methods and some - but not sure if that would be ok?