Added dates in correct format and removed hard coded dates.

_layouts/post.html

_posts/2014-06-02-dev-diary-for-the-week-of-2014-06-02.md

...s/2014-06-02-monero-missive-for-the-week-of-2014-06-02.md

_posts/2014-06-10-dev-diary-for-the-week-of-2014-06-10.md

...s/2014-06-10-monero-missive-for-the-week-of-2014-06-10.md

_posts/2014-06-18-dev-diary-for-the-week-of-2014-06-16.md

...s/2014-06-18-monero-missive-for-the-week-of-2014-06-16.md

_posts/2014-07-06-dev-diary-for-the-week-of-2014-06-30.md

...s/2014-07-06-monero-missive-for-the-week-of-2014-06-30.md

_posts/2014-07-13-dev-diary-for-the-week-of-2014-07-07.md

...s/2014-07-13-monero-missive-for-the-week-of-2014-07-07.md

_posts/2014-12-15-dev-diary-for-the-week-of-2014-12-15.md

...014-12-15-external-projects-for-the-week-of-2014-12-15.md

...s/2014-12-15-monero-missive-for-the-week-of-2014-12-15.md

_posts/2015-01-05-monero-missive-2014-year-in-review.md

_posts/2016-01-01-monero-0.9.0-hydrogen-helix-released.md

_posts/2016-01-15-monero-0.9.1-released.md

...erview-and-logs-for-the-dev-meeting-held-on-2016-01-31.md

_posts/2016-02-10-monero-missive-2015-year-in-review.md

...erview-and-logs-for-the-dev-meeting-held-on-2016-02-14.md