SectionCount-class: Reference Class for section counts
In pvrqualitasag/rqudocuhelper:

A reference object of reference class SectionCount represents the numbers in front of a section title.

The section title number counts the numbers of different section at any given level up and until a given section title. In a markdown (md) document section levels of titles are denoted by hash (#) signs. Based on the number of hash signs of a given section title, the level of the corresponding section title can be inferred. The more hash signs the lower the level of the section title. Hence one hash means top-level section title, two hashes stand for subsections, three hashes denote subsubsectiones, etc. For a given section title the level determines the corresponding number of the section title. For a top-level section there is just one number, for a subsection there are two numbers separated by a dot (.) and for subsubsections there are three numbers all separated by dots. Each of the numbers that are associated with a given section title count the number of sections for a specific level up and until that given section title.

vSectionCount: vector with section counts

incrSectionCounts(): Increment section counts based on number of hash signs
initialize(): Initialize count fields and set default for count separator
sGetSectionNumber(): Return section number as string, as soon as a count is zero we stop pasting together. This assumes counts are 1-based.