Add option to pass other settings to requests lib

[J535D165]

Solution for #12.

1. Parameters like proxies, verify and cert can be passed to every request in cbsodata.
2. Define global values for parameters like proxies, verify and cert with the cbsodata.options.requests setting.

In [1]: import cbsodata                                                                             

In [3]: cbsodata.options.requests['verify'] = "xyz"                                                          

In [4]: cbsodata.options.requests['verify']                                                                  
Out[4]: 'xyz'

In [5]: cbsodata.get_info("82070ENG")                                                               
Out[5]: 
{'ID': 0,
 'Title': 'Caribbean Netherlands; employed labour force characteristics 2012',
 'ShortTitle': 'Caribbean NL; employed 2012',
 'Identifier': '82070ENG',
 'Summary': 'Employed labour force national and international definition\nby sex by position in the labour force and gross monthly income',
 'Modified': '2013-11-28T15:00:00',
....

In [6]: cbsodata.get_info("82070ENG", verify=True)                                                  
Out[6]: 
{'ID': 0,
 'Title': 'Caribbean Netherlands; employed labour force characteristics 2012',
 'ShortTitle': 'Caribbean NL; employed 2012',
 'Identifier': '82070ENG',
 'Summary': 'Employed labour force national and international definition\nby sex by position in the 
...

[ties]

I like this feature!

[ties]

This API will prevent the usage of kwargs for filters in the future without breaking backwards compatibility (such as in django). Please consider that when making this design choice.

[J535D165]

Thanks for this feedback. I think I will implement something like this in the OData4 version #8. This OData3 API deprecates in 2020.

[ties]

I have a partial implementation of an OData query parser if anyone is interested (grammar + a number of abstract syntax tree manipulations to rewrite it).

Unfortunate it is part of a larger prototype that is not release ready - but ping me if there is interest.

[J535D165]

I'm welcoming all contributions to the OData version 4 API :)

[ties]

Nice forward compatibility 👍

[J535D165]

@joosbuijsNL can you test this implementation?

[joosbuijsNL]

@joosbuijsNL can you test this implementation?

Confirmed, this works! Thanks a lot! :)

[J535D165]

Closes #12