If an SxS has a header with the same label twice, don't create a new SxS
Merge adjacent analyses
Backtracking citations should be avoided when processing SxS
Don't assume all SxS are about the same CFR part
Merge pull request #233 from khandelwal/supp

Regulation specific definition ignore lists
Merge pull request #232 from cmc333333/sxs-parent

SxS Header Processing Updates
Merge pull request #235 from khandelwal/supp

Add <FP> to list of tags for paragraphs in SXS analysis
Catch a few additional citations
Merge pull request #236 from cmc333333/citation-extended

Catch a few additional citations