Package `Title` must be title case

CRAN requires the package `Title` field to be title case; text should note this.
Update demo.Rmd

Removed stray word
Merge pull request #90 from revodavid/patch-1

Update demo.Rmd
demo.Rmd: missing word in "instead write vignette"

Should be "instead write a vignette" or maybe "instead write vignettes".
Merge pull request #92 from kbroman/patch-1

demo.Rmd: missing word in "instead write vignette"
Proof reading misc
First pass through inst
Update index
vignettes: advice for writing vignettes
vignettes: CRAN notes & Where next
Update vignettes.rmd
Merge pull request #93 from lindbrook/patch-3

vignettes: advice for writing vignettes
Merge pull request #94 from lindbrook/patch-4

vignettes: CRAN notes & Where next
Update namespace.rmd
Update namespace.rmd

Remove another duplicated word.
Merge pull request #95 from adessy/patch-1

Update namespace.rmd
Merge pull request #96 from adessy/patch-2

Update namespace.rmd
Update namespace.rmd

Fix typos
Merge pull request #97 from adessy/patch-3

Update namespace.rmd
Serious start on check chapter.
More notes on release and git.