Add drift

[aaneja]

Clone of #102 (except 759cc99)

This simplifies the upgrade and release process for airlift by combining the repositories into one. The changes are split into a few commits.

1. Copies drift file-for-file into the repository
2. Updates the pom.xml files for compatibility with the existing airlift build
3. Updates drift's groupId to prevent name clashes with the old com.facebook.drift groupId
4. Updates drift's versioning to align with the airlift repository's versioning scheme