Organize our posts a little

...te/content/posts/open-source-at-large/commoditization.rst

.../content/posts/open-source-at-large/ecosystem-mapping.rst

...open-source-at-large/influencing-open-source-projects.rst

...ntent/posts/open-source-at-large/open-source-at-large.rst

...t/posts/open-source-at-large/open-source-goal-setting.rst

...sts/open-source-at-large/open-source-readiness-models.rst

...sts/open-source-at-large/what-is-open-source-strategy.rst