Update ORA to 2.6.16 | Fixes the text_response property to be more backwards-compatible with _old_ ORA blocks.

This reverts commit 0c8d66bb.

We needed those files for the push translation
jenkins job as job has been updated to run
without commiting any changes to reo. we no
longer need those files in repo.

translations to transifex. This will help edx-platform
automated jenkins translation job understand when to push
translations to transifex.

LEARNER-1860

FEDX-121

The previous approach for handling NPM assets was
to symlink them into the static directory. This appeared
to cause trouble with the asset pipeline where the files
in question were not installed and then old versions were
picked up instead.

This change instead copies NPM libraries to a new
static directory so that the pipeline can consume them
as with any other file. This new directory is added to
.gitignore so that the files don't get accidentally
checked in.

Sass compilation is no longer dependent on Ruby, so we are
removing its dependencies.

This is a squash of 38 commits ending with
5b080f979d692804452400ac5bed9b17c50b001e

* adding in missing web certs Sass/CSS asset settings
* updating .gitignore