…file

Implements feature request in onsi#753

…its ginkgo metadata

The post-order traversal needs to check whether the AST Node is a ginkgo node.
That can be done by comparing the positions of the AST Node and the last
visited ginkgo node. Deriving the ginkgo metadata is not necessary.

…us/pending properties

…t results

To make it easier to maintain the outline tests.

The content has not changed; only the JSON formatting and the filenames have
changed.

The top-level function needed to be shorter.

Again, the top-level function needed to be shorter.

Keep the unexprted ginkgoNode code in a separate file.

…e in outline

An advantage of embedding is that it does not require casting. The outline
receivers does not change.

The "text" was being ignored by mistake.

The test and its result samples were already present, but the test was not run.

This is really just for fun. Here's an example:

``shell
ginkgo outline -format=indent outline/_testdata/normal_test.go
```

```shell
Name,Text,Start,End,Spec,Focused,Pending
Describe,NormalFixture,116,605,false,false,false
    Describe,normal,152,244,false,false,false
        It,normal,182,240,true,false,false
            By,step 1,207,219,false,false,false
            By,step 2,223,235,false,false,false
    Context,normal,247,307,false,false,false
        It,normal,276,303,true,false,false
    When,normal,310,367,false,false,false
        It,normal,336,363,true,false,false
    It,normal,370,396,true,false,false
    Specify,normal,399,430,true,false,false
    Measure,normal,433,480,true,false,false
```

It also happens to look nice piped through `column`:

```shell
ginkgo outline -format=indent outline/_testdata/normal_test.go | column --table -s=","
```

```
Name            Text           Start  End  Spec   Focused  Pending
Describe        NormalFixture  116    605  false  false    false
    Describe    normal         152    244  false  false    false
        It      normal         182    240  true   false    false
            By  step 1         207    219  false  false    false
            By  step 2         223    235  false  false    false
    Context     normal         247    307  false  false    false
        It      normal         276    303  true   false    false
    When        normal         310    367  false  false    false
        It      normal         336    363  true   false    false
    It          normal         370    396  true   false    false
    Specify     normal         399    430  true   false    false
    Measure     normal         433    480  true   false    false
```