Start breaking down basic.t into 10xs.t and 20basic.t
Cleanup
Test that all necessary constants exist
Test that all necessary functions exist
Clean up notmuch_status_to_string()
Fix function names in test descriptions
Start factoring out a utility function mk_maildir()
Clean up notmuch_database_create()
Clean up notmuch_database_open()
Move more specific to a utility function mk_maildir()
Remove func. tests, focus on the XS layer
Cleanup .gitignore
Make an example on customizing libnotmuch paths
Move a test helper mk_maildir into a helper module t::corpus