Add a C++-implemented melt
Some fixes for R CMD check + roxygenize
A less expensive 'variable' column generator
Add an optimized rep, rep_each for more speed
More shield/armor and less PROTECT; specialized data.frame rownames setting
Move matching logic to R; reformatting of melt.cpp
Remove unused helper_match; don't use SET_VECTOR_ELT
Some tidying up
Fix setting of row.names
Minor tweaks to formatting
Merge branch 'master' into cppmelt
NEWS update
Merge pull request #39 from kevinushey/cppmelt

A C++ version of melt.data.frame