dplyr 0.1.3

Bug fixes

• select() actually renames columns in a data table (#284).
• rbind_all() and rbind_list() now handle missing values in factors (#279).
• SQL joins now work better if names duplicated in both x and y tables (#310).
• Builds against Rcpp 0.11.1
• select() correctly works with the vars attribute (#309).
• Internal code is stricter when deciding if a data frame is grouped (#308):
  this avoids a number of situations which previously causedd .
• More data frame joins work with missing values in keys (#306).