Check before creating schema table

We weren't checking for the existence of a _schema table before we
created it because logically it shouldn't be there, but sometimes
because of errors or something it might already exist so we need
to check before we go around creating tables willy nilly.
Fix data mappings for mysql->mssql
prevent length less than zero errors by not trying to take negative length substrings
fixing empty error bug in certain stack traces
new branch
proj file
DataCopy working, maybe. At least the first code through is done.
Done with the first draft
Fixed some schema stuff
Fixed some query stuff
almost done with the ddl stuff
drop ddl and some of the update ddl is done
adds and drops work
datarows dont have an accessible constructor
finished the first pass
fixed a zero timestamp/datetime thingy in the connection string
fixing mysql syntax in gettables() in mysqldatautils
first pass at clearing out trigger tables on maintenance
adding cleaning up trigger tables
forcing innodb on all created tables to not affect cluster performance