Support Gihtub Authorization

If login is faced Github Authorize #34 (comment)

Minor Fixes for Xpath Config Name

v1.0.3

bump up patch version for force_bake fix (#33)

Using DotEnv for Config, Email Logs

Merge pull request #23 from medyagh/dotenv

Use DotEnv for config, Logs in Email

Support for Kubernetes and Pre-commit formatting

run

make developer-setup

to setup pre-commit hooks.

look at kube folder to run in minikube.

Email Screenshots Feature

This new feature will send an email with the screenshot of winnaker run right before it exits, if there is a WINNAKER_EMAIL_SMTP is set.

introducing three new configs

WINNAKER_EMAIL_FROM
WINNAKER_EMAIL_TO
WINNAKER_EMAIL_SMTP

Verbose Logging Feature.

Adding logging mechanism using python logger (#19)

* Adding logging mechanism using python logger
To get more verbose logging use -v. Beware this prints out EVERYTHING selenium does because selenium also incorporates the verbose logger

Here is the example log output

```
~/Repos/EdwinAvalos/winnaker$ winnaker -s -nlb

____    __    ____  __  .__   __. .__   __.      ___       __  ___  _______ .______
\   \  /  \  /   / |  | |  \ |  | |  \ |  |     /   \     |  |/  / |   ____||   _  \
 \   \/    \/   /  |  | |   \|  | |   \|  |    /  ^  \    |  '  /  |  |__   |  |_)  |
  \            /   |  | |  . `  | |  . `  |   /  /_\  \   |    <   |   __|  |      /
   \    /\    /    |  | |  |\   | |  |\   |  /  _____  \  |  .  \  |  |____ |  |\  \----.
    \__/  \__/     |__| |__| \__| |__| \__| /__/     \__\ |__|\__\ |_______|| _| `._____|

2017-06-18 12:45:13,812 [INFO]  Winnaker Version: 0.5.0
2017-06-18 12:45:13,812 [INFO]  Current Config: Namespace(app='edwintestapp', forcebake=False, headless=False, nolastbuild=True, nologin=False, pipeline='test', start=True, verbose=False)
2017-06-18 12:45:26,338 [INFO]  - Logged in to the spinnaker
2017-06-18 12:45:29,772 [INFO]  - Searched for application: edwintestapp
2017-06-18 12:45:34,888 [INFO]  - Selected pipeline: test successfully
2017-06-18 12:45:40,422 [INFO]  - Starting Manual Execution
2017-06-18 12:45:50,423 [INFO]  	 Running ... (will wait up to 100 minutes
  0%|                                                                      | 0/600 [00:00<?, ?it/s]2017-06-18 12:45:50,539 [INFO]  Username: [email protected]
2017-06-18 12:45:51,936 [ERROR]  Pipeline stopped with terminal state. screenshot generated.
2017-06-18 12:45:51,936 [ERROR]
    !!!!!!!!!!!!!!!!!!
        FAILED
    !!!!!!!!!!!!!!!!!!
```

I also fixed up some values in config.sh that had extra ]s that I got in somehow...

* Remove some whitespace that got in here

* Bump up version

Exponential Backoff Feature

More civilized Retrying, solves some stale element chrome execeptions.

Alpine Image

shrinking the docker image size from 612 MB to 275 MB

Newest Xpath, added a XPATH_versions.md doc for older spinnakers

Updating XPATHs for newer versions of Deck (#13)

* Updating XPATHs for newer versions of Deck

* The Execution boxes changed a bit from executions to execution-groups
* Updated the config files and env sample to default to those as well.
* Updated minor typo in readme.md

* Bumping minor to fix bugs

* Adding file for documenting XPATH changes

* downgrade the values in the table

Safe Defaults for the XPATHs

Adding get-env to helpers for sane defaults (#12)

* Adding get-env to helpers for sane defaults

* This makes it so you don't need to necessarily add the XPATH overrides
We could also move those out of the sample env, but I chose to leave them

* Adding a test for the get_env function in helpers_test.py

* Fixing a few errant ] that I forgot to delete