Updating code as per pep8 recommendations

Not everything is updated, some parts don't make sense enough to follow.

These are the few more errors pending: 

```
(env)shrayas at shrayas-mac in ~/code/hacks/broadgauge on master*
❯ pep8 broadgauge/
broadgauge/oauth.py:26:52: E231 missing whitespace after ':'
broadgauge/oauth.py:27:33: E225 missing whitespace around operator
broadgauge/oauth.py:28:55: E231 missing whitespace after ':'
broadgauge/oauth.py:29:33: E225 missing whitespace around operator
broadgauge/oauth.py:68:52: E231 missing whitespace after ':'
broadgauge/oauth.py:69:33: E225 missing whitespace around operator
broadgauge/oauth.py:70:55: E231 missing whitespace after ':'
broadgauge/oauth.py:71:33: E225 missing whitespace around operator
broadgauge/oauth.py:72:47: E231 missing whitespace after ':'
broadgauge/oauth.py:72:68: E225 missing whitespace around operator
broadgauge/oauth.py:73:41: E225 missing whitespace around operator
broadgauge/webapp.py:20:80: E501 line too long (80 > 79 characters)
```

In `oauth.py`: The `missing whitespace after ':'` error occurs because there isn't a whitespace after `:` when `:` is being used within `https://`. Which doesn't make sense. 

In `webapp.py`: Line 20 is a line describing a URL pattern. Doesn't make sense to split that to another line.

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This is the first time i've found out about the `pep8` tool and done these changes. Please advise.