Removed the columns that the option expanders were under to help with…

… longer labels in the page links.

Updated CHANGELOG.

Made the fix for Issue 17 by adding another text input for users to s…

…et the branch of their repo to get the model file from.

Updated the Aurora PK/PD version number that displays under the logo.

Merge branch 'main' of https://github.com/Borealis-BioModeling/aurora…

…-pkpd into version-0.1.0