Incorporating final team feedback on specs for release.

[mookerji]

• Includes clarifying remarks for datasheet copy, as well as
  documentation for the existing SBP messages. Note that some of the
  feedback was out-of-scope for this current release, as they'd
  require some contract changes to existing messages.
• A few bug fixes to the latex generation (missing fields and offset
  error with total message size).

/cc @fnoble @denniszollo @mfine

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[mfine]

On page 2, have "Note that..." followed by another "Note that..." - make these two paragraphs?

[mfine]

On page 4 - the underlining in TeX looks a little meh... maybe use italics instead?

[mfine]

On page 4, we should cancel out the 0 in 6N + 0 (I can supply a diff for that)

[mfine]

On page 5, what's a "well-survey base station position"? Is that a thing or should it be "well-surveyed" or something?

[mfine]

On page 18, "File Io" continues to look weird instead of "File IO"

[mfine]

Looks amazing! Great job!

[mfine]

For taking out 6N + 0:

--- a/generator/sbpg/targets/latex.py
+++ b/generator/sbpg/targets/latex.py
@@ -270,7 +270,10 @@ def render_source(output_dir, package_specs):
         if multiplier == 1:
           adj_size = "N+%d" % (size - 1) if size > 1 else "N"
         elif multiplier:
-          adj_size = "%dN+%d" % (multiplier, size - multiplier)
+          if multiplier == size:
+            adj_size = "%dN" % multiplier
+          else:
+            adj_size = "%dN+%d" % (multiplier, size - multiplier)
         else:
           adj_size = "%d" % size
         ti = TableItem(pkg_name, d.identifier, d.sbp_id,

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