site now has a dtheta attribute

[JesseSandberg]

Description

Sites that were only one theta bin wide caused outline_site to fail because dtheta was being determined on the fly by outline_site without sufficient information to determine dtheta in the case that only one theta bin was provided. Now, dtheta is an attribute of the site that gets set by create_simple_site and gets accessed by outline_site.

Usage Changes

None

Todos

Notable points that this PR has either accomplished or will accomplish.

• Creates dtheta attribute of Site
• dtheta is set by create_simple_site
• outline_site now correctly draws single-theta-bin sites

Pre-Review checklist (PR maker)

• Check to make sure outline_site gives desired results

Review checklist (Reviewer)

• Checkout branch 95-outline_site-cannot-calculate-dtheta-when-the-site-is-one-bin-wide
• IMPORTANT!!!! re-install the DTA package (instructions on DTA repo readme)
  single-bin-test.zip
• Use the testing nb and confirm that outline_site correctly draws one-bin-wide sites
• I understand what the changes are doing and how
• I understand the motivation for this PR (the PR itself is appropriately documented)

Status

• Ready for review