This reverts commit 80c9d793.

Pelican uses python, which allows us to create a python
virtual environment in this project to hopefully get to a point
where anywone can contribute to the website without any installation.

Update scripts for deploying website.

Looks like I have different versions of the required dependencies,
which did not match those specified in our current Gemfile.lock.
Hence `jekyll build` would break for me.

Adding Gemfile.lock to .gitignore to allow people to use different
versions of gem dependencies. (After all, we are only just
generating static html pages with bundler probably isn't that
important that we all use the same versions of stuff...)