described some keynodes
fixed some syntax errors
misc fixes to documentation structure; some sections' contents added
fixed several typos and omissions in knowledge base
system_element reflexive arc added
fixed structural types for two relations
SC-code representations description added (_to_edit version)
representation sections updated - old files removed, only structure left
Merge branch 'master' of https://github.com/ShunkevichDV/ims.ostis.kb

some files were missing
described several keynodes and their respective sections
eliminated empty decompositions from atomic sections
Merge pull request #9 from ShunkevichDV/master

SC-code representations updated