instead of cwd and load the application before doing anything
In OTP releases cwd != app directory and the configuration is read
only if the application is loaded
instead of aliasing
This seems to be the convention for functions that can be reused between
different mix tasks in all Elixir projects I've seen and it gets rid on
an error message when someone runs mix pleroma.common
Also in this commit by accident:
- Move benchmark task under a proper namespace
- Insert a space after the prompt
