create the archive for newsletters

[KristijanArmeni]

IMO it would be nice to create a subpage (perhaps under 'resources' tab?) where we place archives of all newsletters, so that people can read them post-hoc if they won't to subscribe. Also, this would boost the visibility of this particular ... akhm ... 'deliverable'.

To consider:

• does this sound like a good idea to begin with?
• if so, where would this be placed on the website?
• where to place the text it in the /docs, create a new jekyll collection for this?

[robertoostenveld]

this should try to address #26 as well

[robertoostenveld]

I worked on this with @suhasvijayakumar, and have not figured it out yet.

However, I did just confirm that the problem is in the config.yaml: when I replace that in OSCN with the original one from https://github.com/mmistakes/mm-github-pages-starter, I can get a list of posts.