Remove accent from "attache" written to init file
Check for unset git configs in init

Fixes #17 by checking in the main attache entry point.

Since most or all attache commands will rely on git being setup
correctly, it seems to make sense to have it there.
Clean up dangling usages of ATTACHE_DIR
Add a docstring for the open command
Delete attache-open script

It's actually impossible for it to be implemented as a script. Because
then the cd gets executed in a different process. See #18 for more info.
Explicitly check whether git is available
Attempt to read current profile from git config
Add notes on implementation of use
Make attache init allow named profiles. Add weak error checking.