Cannot write cell value using numpy
*Created originally on Bitbucket by [CoryKramer (Cory Kramer)](https://bitbucket.org/%7Bb770e48f-bd38-468d-8272-9cf6671cbd8f%7D/)*
The following code works without issue
```
#!python
import openpyxl
workbook = openpyxl.Workbook()
sheet = workbook.create_sheet('Test')
sheet.cell(row=1, column=1).value = 1.0
```
However the following version of this code causes an error
```
#!python
import numpy
import openpyxl
workbook = openpyxl.Workbook()
sheet = workbook.create_sheet('Test')
a = numpy.array([1.0])
sheet.cell(row=1, column=1).value = a[0]
```
In the latter case, the `value` being assigned is of type `numpy.float64`. In the `Cell._bind_value` method, this type is not considered to be `NUMERIC_TYPES` so therefore causes a `ValueError` at the end of the method.
issue