Ignore common IDE and editor files.
[doc][s]: embed census overview diagram.
Merge branch 'master' into develop
[cli][xs]: correct typo in 88f9568a1ea3ef265f9c97514abc39132fa1e47f.
Adds a nunjucks filter for parsing template strings as markdown, using the project's existing markdown module - marked.
Adds new `marked` filter to question descriptions. Closes #406.
Some small additions to the read me for setting up a development environment.
Merge branch 'develop'