SMT-LIB requires real literals to have a decimal point. So we do that.

In SMT-LIB, any real literal *must* have a decimal point, otherwise various
parsers may explode.  Since I know if a literal is supposed to be real, fix
this issue by appending a harmless ".0" to the string of the number.  Fix
tests to verify this.

git-svn-id: https://groke.mcmaster.ca/svn/grad/colin/branches/TableTool_javization@10657 57e6efec-57d4-0310-aeb1-a6c144bb1a8b