Added a quoted-token parsing function.
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.
Documented strqtok().
Added an attribution.
Slightly refined the strqtok() documentation.
Conformed to the cc65 project's coding style.
More conforming to the cc65 project's apparent writing style.
Merge pull request #118 from greg-king5/quoted-token

Add a quoted-token version of strtok().
Updated the function reference document.

* Fixed the description of strncpy().
* Added some [commented out] function names to the lists for some headers.
Merge pull request #119 from greg-king5/strncpy-doc

Update the function reference document.
Updated the CBM error tables.

* Added more mappings between DOS and C codes.
* Changed generic error messages into specific ones.
Merge pull request #120 from greg-king5/cbm-errors

Update the CBM error tables.
small optimization