improve --verbose option

[lepapareil]

It would be useful if the verbose mode also displayed the details of the asserts and returns of the tests in success as it is for failed tests. This way we can also see the false negatives.

[fabricereix]

Captures are logged in verbose mode, it makes sense to also log the successful asserts.

* Asserts
* jsonpath "$.count" equals {{count}}
*     actual: int <5>
*     expected: int <5>
* jsonpath "$.count" exists
*     actual:   int <5>
*     expected: something
* jsonpath "$.toto"  not exists
*     actual:   none
*     expected: not something
* jsonpath "$.errors" countEquals 5
*    actual:   5
*    expected: 5

[fabricereix]

Simlilar to logging captures, source line numbers are not given.

* Captures
* an_object: Object()
* a_list: [1,2,3]
* a_null: null
* an_integer: 1