Add codeclimate integration

.codeclimate.yml

+engines:
+  duplication:
+    enabled: true
+    config:
+      languages:
+        - python
+  fixme:
+    enabled: true
+  radon:
+    enabled: true
+ratings:
+  paths:
+    - "**.py"
+exclude_paths:
+  - tests/
\ No newline at end of file

.travis.yml

 language: python
 git:
   depth: 3
+notifications:
+  email: false
+addons:
+  code_climate:
+      repo_token: 8582900c285e4da0f253555b1bac1ba501bd6ff07850b0f227166b3cdac59ecc
+
 python:
   - "2.7"
   - "3.4"

README.md

 # nd2reader
 
 [![Build Status](https://travis-ci.org/rbnvrw/nd2reader.svg?branch=master)](https://travis-ci.org/rbnvrw/nd2reader)
+[![Test Coverage](https://codeclimate.com/github/rbnvrw/nd2reader/badges/coverage.svg)](https://codeclimate.com/github/rbnvrw/nd2reader/coverage)
+[![Code Climate](https://codeclimate.com/github/rbnvrw/nd2reader/badges/gpa.svg)](https://codeclimate.com/github/rbnvrw/nd2reader)
 
 ### About