rdj: fix, -memlimit does not require bookkeeping
rdj: cleanup, rm obsolete module
rdj: fix output msg of overlap and assembly tools
rdj: fix asqg_writer
seqcorrect: implement iterative correction
seqcorrect: cleanup code
seqcorrect: implement option -find-seldom
string graph: save/load to/from file
rdj: create graph tool
rdj: improve string graph subgraph output
rdj: calculate contigs a-statistics
rdj: update rdj-filesuf-def
reads2twobit: some code formatting
rdj: improve reads2twobit and reads_library
rdj: implement contigs graph
rdj: alternative way to simplify/extend cg
hop: cognate sequence

"cognate sequence" is more accurate than "reference sequence",
accordingly the documentation, help messages and output messages
(as well as some variable names) have been changed
hop: allow -state-of-truth -stats
hop: implement option -qmax
hop: fix option -clenmax