SCn, SCs, SCg description updated
Merge remote-tracking branch 'upstream/master'

ui command decomposition keynode changed in upstream repo
Introductions fixed
SCn, SCg, SCs - keynodes added
Merge remote-tracking branch 'upstream/master'

pulling in missing ui keynode(s)
BNM section added
Merge remote-tracking branch 'origin/master'
BNM description added
Merge remote-tracking branch 'upstream/master'
expanded 'subject domain of sc-knowledge' section
IMS OSTIS KPM described
Merge remote-tracking branch 'origin_fork/master'
scp-interpreter implementation described
search authors and translation commands added
nrel_generalized_syntax_structure described
metasystem and technology description added
Projects start description added
Merge pull request #20 from ShunkevichDV/master

Projects start description added