Improve examples and tests

[GrosSacASac]

fixes #518

[tunnckoCore]

Here we have ba8c8b4 one more test we probably should add too.

I'm not sure what test/legacy is but.. yea.

[lgtm-com]

This pull request introduces 1 alert when merging 9238091 into ca2c2b1 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

[lgtm-com]

This pull request introduces 1 alert when merging e4e3485 into ca2c2b1 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

[GrosSacASac]

ok you can merge when you want

[lgtm-com]

This pull request introduces 1 alert when merging 4568007 into ca2c2b1 - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class

[GrosSacASac]

Can we merge this ?

[tunnckoCore]

Probably.

Here we have ba8c8b4 one more test we probably should add too.

I'm not sure what test/legacy is but.. yea.

[GrosSacASac]

Are we still using test/legacy. I don't know how to cherry pick from another that so I created a new commit

[tunnckoCore]

Are we still using test/legacy.

I don't know. Just for consistency for now :D

Tests are failing https://travis-ci.org/node-formidable/node-formidable/jobs/620813815#L214 ...

For some reason it doesn't make array of fields. The form.multiples should be added before the parseCbOk.

DANG! Tests are awfully awful. :D