Added codecov files.

Author: ZeroCool940711

.coveragerc

@@ -0,0 +1,20 @@
+[run]
+branch = True
+omit =
+    # Autogenerated missed code handles other VCSes.
+    devito/_version.py
+    examples/*__init__*
+concurrency = multiprocessing
+parallel = True
+
+[report]
+# Regexes for lines to exclude from consideration
+exclude_lines =
+    # Don't complain about missing debug-only code:
+    def __repr__
+
+    # Don't complain if tests don't hit defensive assertion code:
+    raise NotImplementedError
+    raise ValueError
+    raise TypeError
+    raise RuntimeError

codecov.yml

@@ -0,0 +1,28 @@
+codecov:
+  require_ci_to_pass: yes
+  notify:
+    wait_for_ci: yes
+
+coverage:
+  precision: 2
+  round: down
+  range: 80...90
+
+  status:
+    # Learn more at http://docs.codecov.io/docs/codecov-yaml
+    project:
+      default:
+        enabled: yes
+        target: 1
+        threshold: 0.1
+    patch:
+      default:
+        enabled: off
+
+ignore:
+  - "**/*.ipynb"
+  - docs
+  - docker
+  - binder
+  - .github
+  - .git