Many changes from Xian + recommended material from Tim Triche
Fix =+ related typos reported by Greg Snow
Tweaks to intro
Merge branch 'rcpp-jjedits'
minor typos and phrasing changes
change vignette links to cran and enhance More Rcpp section
remove duplicated package content
revise examples to use sourceCpp
Better pointer to Dirk's book
Add acknowledgements
Code formatting
Code formatting tweaks
Final tweaks
More rcpp changes from proofing
Style fixes in chapters
More changes from print out
Another fix from Dirk accidentally clobbered
More rcpp
minor fixes
Lots more Rcpp experimentation
More tweaking
More formatting tweaks
Embedded R code. Formatting fixes
First pass on standalone cpp
RLE and vaccinate case study
More on missing values
More Rcpp including sugar
Still more Rcpp
Missing values in RCpp
Still more rcpp