Numerous changes

Added "Row" to row header title. Find Replace Selected area works except
for an "issue" in Find Next.
SBMLModelReader reads all LOCUS entries into Genes column, no duplicate
columns.
Prepared statements added to csv readers. Select All -> Include Columns
works
Clear contents works in reactionsTable (not metabolitesTable).
Reaction equations with full names added

If metabolites do not have full names, abbreviations used, works for
SBML and csv although most csv files don't have full names.
Also gene associations column added, works for SBML, not yet for csv.