Community Writers Program - v2

closes https://gitlab.com/gitlab-com/gitlab-docs/issues/92 closes https://gitlab.com/gitlab-com/marketing/issues/717 closes https://gitlab.com/gitlab-com/marketing/issues/783

DEPENDS ON:

• !5361 (merged) TO BE MERGED BEFORE THIS (this branched was checked from the !5361 (merged)'s branch)
• https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9984 TO BE MERGED BEFORE THIS (the definition and the folder structure for Technical Articles and Topics is there).

Review Apps links:

• Community Writers Webpage: https://comm-writers-v2.about.gitlab.com/handbook/product/technical-writing/community-writers/
• Community Writers T&C: https://comm-writers-v2.about.gitlab.com/handbook/product/technical-writing/community-writers/terms-and-conditions/
• Blog post: https://comm-writers-v2.about.gitlab.com/2017/04/11/announcing-the-new-community-writers-program/

Todos:

• Sean or Job: merge !5361 (merged)
• Axil: review and merge https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9984
• Marcia: review
• Solve the copyright issue https://gitlab.com/gitlab-com/gitlab-docs/issues/95
• Sean: review/approve
• Marcia: write blog post to communicate the changes, add to this MR
• Marcia: add comm writers new tracker: https://gitlab.com/gitlab-com/community-writers
• Marcia: check/add license (according to https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/legal/individual_contributor_license_agreement.md)
• Marcia: remove references to comm writers program from the blog handbook

cc/ @axil @seanpackham