Executes an Oracle PL/SQL stored procedure. The first parameter identifies the SQL handle to the database. The second parameter is a command string used to invoke a PL/SQL stored procedure. For some strange reason, PLSQLCommand bind vars don't use the colon delimiter, so we need to parse the bind vars, add the delimiter and reassemble the string.

public static bool PLSQLCommand(
	SalSqlHandle hSql,
	string command
)