Bug fixes for version 6_0_00
1) Incorrect signed to unsigned conversion in some cases.
Updates for version 6_0_00
1) control of warnings based on compiler directives (`finwarningon `finwarningoff)
2) support for `undefall
3) increased maximum number of function arguments
4) Performance improvements
5) New compiler directives `finRemSpecifyOn and `finRemSpecifyOff to
remove unwanted specify blocks