Duplicate IDs for the macOS / Linux tabs in the "Text Editor" section
prevented anything from showing up when you click on the "Linux" tab.

Fixes #585

SWC changes: wrote a bash script that is tested against git-bash and the linux subsystem for windows thingo (via someone else in slack) to pull a copy of sqlite from sqlite.org and add it to local bin and then add that local bin to bash path.

DC changes: there's a pull request asking for the sqlitebrowser, so I added a check if the workshop is dc, which just points them at the sqlite browser download page.

Introduced in commit e31462b1 .

TextWrangler by Barebones Software has been sunset, but they have made BBEdit free now.

filename has been changed from google-refine.exe to openrefine.exe some time ago

Alter Win+Anaconda instructions to match current Anaconda installer text.

`bellow` -> `below` (almost not worth a PR, but still)

Move complete survey text above if-else conditions to reduce repetition of HTML per https://github.com/carpentries/workshop-template/pull/516#discussion_r204039965 @rgaiacs

Add LC condition to add pre and post survey links to fix https://github.com/carpentries/workshop-template/issues/511