FMSLogo Code

Fix an inaccuracy: primivites are compiled-in procedures not in logolib.

Fix a typo: "you exits" -> "you exit"

Clarification: add markup and text to clarify that "proc" is a file name.

Translate the "Command-line Options" section to Spanish.

Add a missing step for configuring FMSLogo to start in expert mode
(you have to select Properties from the popup menu).

Translate the "Where to Start" (mostly copied from Rosario Ruiz's translation)

Add style guidelines for the Spanish version, mostly to document
the use of the "tu" form.

Translate one more paragraph of the introduction.

Add a rough style guideline to help ensure that future updates
to the manual fit into a coheasive whole.

Translate four more paragraphs of the introduction and correct some spelling errors