FMSLogo Code

Translate the documentation for the "Windows Commands" to Spanish.
The translation was based on Rosario Ruiz's translation of the MSWLogo manual.

Translate the commands in the section "Turtle Control" to Spanish
This translation is based on Rosario Ruiz's translation of MSWLogo's manual.

Correct a misspelling of the command name ROTULO.

Fix a mispelling of the name LLAMADLL

Minor changes to FILL documentation to conform to style guide:
* Upper-case a usage of the command name.
* Move explanatory comment in examples from code listing to surrounding paragraph.

Improve the grouping of sentences into paragraphs

Move the explanatory comment in the example for DLLCALL into the proceeding paragraph.
This is a more natural place to explain what the code is doing any why.

Document that HEADING is measured clockwise from the Y-axis

Fix a copy&paste error that prevented the POSXYZ example from running.

Add PERSPECTIVE to the example for ZCOR
Without it, SETZ does nothing and the output won't match what's shown in the example.