Prepare to write unit tests

.coveragerc

+[run]
+branch = true
+source = webssh
+
+[report]
+exclude_lines =
+    if self.debug:
+    pragma: no cover
+    raise NotImplementedError
+    if __name__ == .__main__.:
+ignore_errors = True
+omit =
+    tests/*

.gitignore

@@ -36,6 +36,7 @@ htmlcov/
 .tox/
 .coverage
 .cache
+.pytest_cache/
 nosetests.xml
 coverage.xml
 

.travis.yml

+dist: trusty
+sudo: false
+
+language: python
+python:
+  - "2.7"
+  - "3.4"
+  - "3.5"
+  - "3.6"
+
+install:
+  - pip install -r requirements.txt
+  - pip install pytest pytest-cov codecov flake8
+
+script:
+  - pytest --cov=webssh
+  - flake8 --exclude='.git'
+
+after_success:
+  - codecov

README.md

 ## WebSSH
-A simple web application to be used as an ssh client to connect to your ssh servers. It is written in Python, base on Tornado and Paramiko.
+[![Build Status](https://travis-ci.org/huashengdun/webssh.svg?branch=master)](https://travis-ci.org/huashengdun/webssh)
+[![codecov](https://codecov.io/gh/huashengdun/webssh/branch/master/graph/badge.svg)](https://codecov.io/gh/huashengdun/webssh)
+![license](https://img.shields.io/github/license/mashape/apistatus.svg)
+
+A simple web application to be used as an ssh client to connect to your ssh servers. It is written in Python, base on tornado and paramiko.
 
 ### Preview
 ![Login](https://github.com/huashengdun/webssh/raw/master/preview/login.png)
@@ -18,7 +22,7 @@ A simple web application to be used as an ssh client to connect to your ssh serv
 git clone https://github.com/huashengdun/webssh.git
 cd webssh
 pip install -r requirements.txt
-python main.py
+python webssh/main.py
 ```
 
 ### Options

requirements.txt

 paramiko==2.4.1
-tornado==5.0.1
+tornado==5.0.2