Add section headings for readability.
Update documentation to reflect renaming of nutsepsilon function.
Simplify parallel code.
Add pdf plots for latex documentation.
Modify section headers for better organization in latex documentation.
Remove empty code sections.
Update documenation version to 0.2.1.
Add changelog file.
Italicize package name.
Link to package documentation on readthedocs.
Load Cairo package to use PDF backend.
Add Cairo package for testing.