Fixed a ca65 internal error that would show a message when a name is exported both outside and inside a scope.

Jeremy Turner described the bug, on the original cc65 mailing list.  It was fixed by Ullrich von Bassewitz.
Merge pull request #116 from greg-king5/symbol-table

Fix a ca65 internal error.
Set the "simple" bit in the .o65 mode word only if text, data, and bss
are adjacent.
Merge pull request #117 from groessler/something_to_pull

Set the "simple" bit in the .o65 mode word only if text, data, and bss are adjacent.