Change i.e.'s to e.g.'s

i.e. means, essentially, "in other words." Use this to clarify meaning.

e.g. means "for example." Use this to provide an example (of many possible examples).

Signed-off-by: Andrew Phelps <andrew@phel.ps>
Fix commas

Signed-off-by: Andrew Phelps <andrew@phel.ps>
Remove space before link

Signed-off-by: Andrew Phelps <andrew@phel.ps>
Merge pull request #34 from phelps/master

Trivial copy edits