fix adding nulls to vector, random test will test it now too
got rid of test/src/ folder
created deterministic test for nulls
Merge pull request #25 from vacuumlabs/remove_vector_model

got rid of test/src/ folder
Merge pull request #24 from vacuumlabs/vector_fixnull

fix adding nulls to vector, random test will test it now too
Fix hashing, do not use bigint
Merge remote-tracking branch 'origin/master' into documentation