Reorganize samples and write unsupported element to ODText and RTF

[ivanlanin]

I created two folders under samples, i.e. resources and results. The names should explain their functions.

[ivanlanin]

@Progi1984 I've merged and checked @bskrtich and @jhfangying pull requests. But I haven't merged @RomanSyroeshko pull.

[ivanlanin]

It's #118 and #119. I think @jhfangying would like to cancel #111 and replace it with #118.

[Progi1984]

@ivanlanin I have merged independantly @bskrtich and @jhfangying pull requests. Can I merge your pull request ?

[ivanlanin]

Later please. I'm still doing some more unit tests for the Writer. Thanks.

[ivanlanin]

@Progi1984 I'm done (for now). Please merge. We now have 71.84% code coverage :)

[Progi1984]

Summary:

• Classes: 37.84% (28/74)
• Methods: 75.63% (478/632)
• Lines: 72.52% (3864/5328)
  Link : https://travis-ci.org/PHPOffice/PHPWord/jobs/20689839#L3308

[ivanlanin]

Great! We have so many tests created within a week. I believe we'll be more stable once with more tests. Thanks for pushing this.

[Progi1984]

@ivanlanin Yep, you have right... but it's all your work (mainly you, @gabrielbull & @RomanSyroeshko) which helped to get there. (0% to 72,52% of lines) Good job, guys :)

[ghost]

It was a genuine pleasure. :)