Some Stocks endpoints return incorrectly

[addisonlynch]

It appears that some endpoints (such as get_earnings are returning incorrectly-formatted data)

from iexfinance import Stock

aapl = Stock("AAPL", output_format='pandas')
aapl.get_earnings()

#                                                                            AAPL
# earnings [{'fiscalPeriod': 'Q4 2017', 'announceTime': '...
# symbol                                                                     AAPL

This is incorrect. In addition, odd behavior is that get_earnings sometimes returns with a symbol index, and sometimes does not. This would cause calls like aapl.get_earnings()["totalDebt"] to fail.

[addisonlynch]

The Stocks/earnings and Stocks/financials endpoints return differently than the rest of the group, in that they have an extra dictionary level:

{
  "symbol": "AAPL",
  "earnings": [
    {
      "actualEPS": 2.1,
      "consensusEPS": 2.02
      ...

This causes some requests to return a symbol-indexed dictionary of the endpoint instead of the actual endpoint. This also causes pandas format to be incorrect.

[addisonlynch]

Merged #35.