FMSLogo Code

Translate the documentation for the file I/O commands into Spanish.

Improve the DRIBBLE/NODRIBBLE documentation
1) Add cross-referencing
2) Note that the example must be run line-by-line
(otherwise the dribble file is closed before it logs instructions)
3) Change the first sentence of DRIBBLE to match the style of the
rest of the manual (not "This command does X", but "Does X")

Clarify that setting passing binmode as TRUE will affect both reading and writing.

Add a link to DRIBBLE, in case "the dribble file" is not self-evident.

Fix the initial line to match the style of the rest of the manual.
(That is, not "this command does X", but "does X".

Fix Bug #511; Fix the Spanish translations for READPOS and WRITEPOS (as
POSLECTURA and POSESCRITURA, respectively).

Standardize on "archivo" as the translation for "file", not "fichero".
This is what Wikipedia uses and is what Daniel Ajoy used in all of the
text messages.

Translate the documentation for the Receptors to Spanish.
This was based on the translation of MSWLogo's manual by Rosario Ruiz.

Fix a typo: "the the" -> "that the"

Translate the "Transmitters" section of the Communications chapter into Spanish.
The translation was based on Rosario Ruiz's translation of the MSWLogo manual.