Glossary.md: Correct some typos, some style

A couple examples, but many others also:
```
    unicode --> Unicode
  MicroSoft --> Microsoft
        ie. --> i.e.
   KataKana --> Katakana
     didiot --> didot
```

### General questions from reviewing `Glossary.md` ....


#### Markup:

Are embedded `<br>` the only way to do that, separate lines?


What's going on in second paragraph under 'Italic'?  Ahh, wanting to show italicized characters.  Well, use markdown's `*italic*` ?  Check results of trying this there.


Ick.  In "Point of Inflection" were the digits '2' supposed to be superscript?  Yes.  Tried `<sup></sup>` but that failed.  Grrr, `/assets/stylesheets/stylesheet.css` is resetting `<sup>` `<sub>` and friends.  Have used `&sup2;` in this change, but how to get general sup/sub?
Also things like the "2/3" of "62 2/3" under 'Point'



#### Problems:

Under 'Kerning', what to do with second paragraph? (missing image?)

Are comments under "Multi-layer fonts" still useful?

Where is 'BlueZone' defined?  (http://www.freetype.org/autohinting/blues.html)
Where is 'path' and/or 'outline' defined?  'open' vs 'closed' ?  How about 'spiro' ?

**Whoa!**   Under 'Terminal'
```
          "When a glyph has serifs the serifs are 
           considered different from the serifs. "
```


#### Style:

When should 'latin', 'cyrillic', 'greek', 'arabic', etc. be capitalized and when not?<br>
And 'postscript', 'truetype' ?
```
      e.g. "... a TrueType or a postscript font ..."
```

Does Jekyl/markdown have capability to make within-document links?  So that mention of 'LGC' could be linked to that entry, and "See Diacritics" could link to that entry?

It seems like definitions of 'point', 'pica', etc. do not explicitly mention the recentering of typography measurements onto the DTP conventions?  (I think everybody has 'conformed' to DTP?)  With more time having elapsed since this text was written, can something more definite / definitive be said?