Fix checking unused local functions and default arguments
Add tests for warning
Merge pull request #1107 from mururu/check-unused-func

Fix missing unused private function and add test for warnings
Start v0.9.1.dev
Fix a bug where `mix deps.get` was not retrieving nested dependencies
Do not abort erl names processing when +iex or +compile appear
Ensure Enum.to_list and Dict.to_list return the same results for dicts
Fix a bug with nested record definitions
Fix a bug where `unquote_splicing` did not work on the left side of a stab op