Merge pull request #4 from emmanuel-keller/master

Add environement variables OSS_RB_URL, OSS_RB_LOGIN, OSS_RB_KEY
dry up a bit more
dry again, refactor error handling
oops forgot the .text there
update to new api
nor reason to do this
we need to create schema fields before indexing
Dry the search method, tests now passing
merge
corrected specs after merge
allow emptying documents