LOGO-L> MSWLogo V6.3b is now available

["George Mills" <mills@softronix.com>]

These fixes are now avaiable in MSWLogo V6.3b

Can't have an MSWLogo release with out a "patch" now can we.

   o Fixed for 6.3b, Fixed crash that would occur on the next polygon
     definition after a previous definition had generated an error.
     That is, my error handler did not correctly clean up the last
     polygon definition that was in error.

   o Fixed for 6.3b, Removed ROLL and PITCH restrictions during polygon
     definitions. For safety sake I added these restrictions but they are
     too restrictive. As long as your polygon vertices are on a single
     plane how you get to those vertices is your business.

   o Added for 6.3a, Fixed READCHAR to properly deal with binary
     files. readchar will return an integer when the file is opened
     in binary mode. You will likely want to use TYPE when writing
     binary files since it will not add a <CR>.

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