Add eachdist and move tox to root folder

.coveragerc

@@ -0,0 +1,6 @@
+[run]
+omit =
+    */tests/*
+    */setup.py
+    */gen/*
+    reference/*

.flake8

@@ -0,0 +1,21 @@
+[flake8]
+ignore =
+  E501  # line too long, defer to black
+  F401  # unused import, defer to pylint
+  W503  # allow line breaks after binary ops, not after
+  E203  # allow whitespace before ':' (https://github.com/psf/black#slices)
+exclude =
+  .bzr
+  .git
+  .hg
+  .svn
+  .tox
+  CVS
+  .venv*/
+  venv*/
+  target
+  reference/
+  __pycache__
+  ext/opentelemetry-ext-jaeger/src/opentelemetry/ext/jaeger/gen/
+  ext/opentelemetry-ext-jaeger/build/*
+  docs/examples/opentelemetry-example-app/src/opentelemetry_example_app/grpc/gen/

.isort.cfg

@@ -0,0 +1,18 @@
+[settings]
+include_trailing_comma=True
+force_grid_wrap=0
+use_parentheses=True
+line_length=79
+
+; 3 stands for Vertical Hanging Indent, e.g.
+; from third_party import (
+;     lib1,
+;     lib2,
+;     lib3,
+; )
+; docs: https://github.com/timothycrosley/isort#multi-line-output-modes
+multi_line_output=3
+skip=target
+skip_glob=**/gen/*,.venv*/*,venv*/*,reference*/*
+known_first_party=opentelemetry,opentelemetry_example_app
+known_third_party=psutil,pytest