Tag bootstrap_javascript use settings include_jquery for now

[metajiji]

Tag bootstrap_javascript has no way to configure jquery parameter via settings.
Also include_jquery does nothing.
This PR fixes this both issues.

[coveralls]

Coverage increased (+0.02%) to 86.468% when pulling 7be2b35 on METAJIJI:patch-1 into 4ed4008 on zostera:master.

[coveralls]

Coverage increased (+0.02%) to 86.468% when pulling 7be2b35 on METAJIJI:patch-1 into 4ed4008 on zostera:master.

[coveralls]

Coverage increased (+0.6%) to 87.064% when pulling 011707a on METAJIJI:patch-1 into 4ed4008 on zostera:master.

[coveralls]

Coverage increased (+0.02%) to 86.468% when pulling 7be2b35 on METAJIJI:patch-1 into 4ed4008 on zostera:master.

[comargo]

By my opinion it should be better to use next statement:
jquery = jquery or get_bootstrap_setting('include_jquery', 'falsy')
And have jquery = None as default value for function

[metajiji]

Yeah right, tnx!

[metajiji]

But this not work, because function https://github.com/METAJIJI/django-bootstrap4/blob/patch-1/bootstrap4/bootstrap.py#L61 return False if can't get option!
For example get_bootstrap_setting('include_jquery', 'default_value') - return False :) lol
because BOOTSTRAP4_DEFAULTS['include_jquery'] is False https://github.com/METAJIJI/django-bootstrap4/blob/patch-1/bootstrap4/bootstrap.py#L39

[metajiji]

Fixed now.

[metajiji]

But this not work, because function https://github.com/METAJIJI/django-bootstrap4/blob/patch-1/bootstrap4/bootstrap.py#L61 return False if can't get option!
For example get_bootstrap_setting('include_jquery', 'default_value') - return False :) lol
because BOOTSTRAP4_DEFAULTS['include_jquery'] is False https://github.com/METAJIJI/django-bootstrap4/blob/patch-1/bootstrap4/bootstrap.py#L39

[dyve]

I'm pulling this in and I'll change (and document) falsy.