FMSLogo Code

Fix a problem with the auto-completion where if it were started just after the " that beings a word or just after the : that being a variable, the suggestions would be for a procedure.

Fix a problem with the auto completion logic where the case-conversion of the suggestions did not convert any non-ASCII characters (characters with accent marks). This make some of the suggestions look weird in non-English languages, which some characters appearing in the wrong case.

Fix a typo (extra comma) and tweak a sentence.

Add a link to Brian Harvey's books on Logo.

Rewrite the introduction matter, which I was told comes across as demeaning.
The new material is more honest and doesn't put undue emphasis on the archaic
distinction between "interpreted" and "compiled" languages.

Make links for POS and POSXYZ in the description of Expert mode.

Change the way the autocomplete logic is invoked from being in ON_KEY_DOWN to using acelerators, invoke this from all of windows that use a CLogoCodeCtrl, and change the shortcut from Ctrl+Enter to Ctrl+Space.

Add a rudimentary implementation of autocomplete for procedures.

Fix the comments to indicate that this file is specific to FMSLogo, not the standard Scintilla.

Remove some conditional compilation that was added to work around
a bug in GTK wxWidgets 2.8 which no longer exists in wxWidgets 3.0.