Issue #55 Lists in kwargs

[Thetwam]

Adds official support for lists in kwargs. Resolves #55.

Simple lists

When a parameter that contains an empty pair of square brackets ([]) needs to be passed, the arguments can be sent as a list.

For example, to get pass following parameter to the list_calendar_events method:

context_codes[]=course_123456

Just pass context_codes as a list:

context = ['course_123456']
canvas.list_calendar_events(context_codes=context)

This allows multiple values to be passed easily at once:

context = ['course_123456', 'user_123']
canvas.list_calendar_events(context_codes=context)

Which would pass this to Canvas:

context_codes[]=course_123456
context_codes[]=user_123

Nested Lists and Dicts

We have had support for nested dictionaries for a while, but that treatment now applies to lists. Lists and dicts can be mixed without any issues.

For example, to pass these arguments to the method to create a new grading standard:¹

grading_scheme_entry[][name]=pass
grading_scheme_entry[][value]=50
grading_scheme_entry[][name]=fail
grading_scheme_entry[][value]=0

Just do this!

g_scheme = [
    {
        'name': 'pass',
        'value': 50
    },
    {
        'name': 'fail',
        'value': 0
    }
]
course.create_grading_scheme(title='Title', grading_scheme_entry=g_scheme)

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¹ Note, this method is not yet implemented but the code in this PR allows it to be created with relative ease.

[coveralls]

Coverage remained the same at 100.0% when pulling ffc8905 on Thetwam:issue/55-lists-in-kwargs into 097ee32 on ucfopen:develop.

[coveralls]

Coverage remained the same at 100.0% when pulling 3dfdc27 on Thetwam:issue/55-lists-in-kwargs into 5f0c579 on ucfopen:develop.