Simple test app using 2.0.0-dev.7 won't build

[jordan0day]

First off, thanks for creating an Ecto 2.* adapter for sqlite!

I'm on Elixir 1.4.2 on OS X, and I created a new project via the standard mix new route. I added :sqlite_ecto2 2.0.0-dev.7 as the sole dependency of the project, mix deps.get && mix compile fetches and builds all the dependencies except sqlite_ecto2:

== Compilation error on file lib/sqlite_db_connection/protocol.ex ==
** (CompileError) lib/sqlite_db_connection/protocol.ex:5: module DBConnection is not loaded and could not be found
    (elixir) expanding macro: Kernel.use/1
    lib/sqlite_db_connection/protocol.ex:5: Sqlite.DbConnection.Protocol (module)
    (elixir) lib/kernel/parallel_compiler.ex:117: anonymous fn/4 in Kernel.ParallelCompiler.spawn_compilers/1

I added db_connection as a dep in my mix.exs, re-fetched and everything built happily. db_connection is currently marked as an optional dependency in sqlite-ecto2 -- should it become a hard dependency?

[scouten]

@jordan0day thanks for pointing this out. I've changed it to a hard dependency in #175 and will be releasing a new version shortly.