Michal&Sam: Refactor the template model generation.
Michal&Sam: Converting benefits to template model.
Michal&Sam: Added date conversion for benefit's start/end
Michal&Sam: Added currency and boolean conversions for benefits.
Michal&Sam: Add benefits to PDF.
Sam&Michal: Added employment section to generated pdf
Sam: Add refused benefits to template model.
Michal&Sam: Add national insurance to form.
Merge pull request #324 from InsolvencyService/refactor-pdf-generation

Refactor pdf generation