Plyr 1.7

rbind.fill: if a column contains both factors and characters (in different inputs), the resulting column will be coerced to character

When there are more than 2^31 distinct combinations id, switches to a slower fallback strategy using strings (inspired by merge) that guarantees correct results. This fixes problems with join when joining across many columns. (Fixes #63)

split_indices checks input more aggressively to prevent segfaults. Fixes #43.

fix small bug in loop_apply which lead to segfaults in certain circumstances. (Thanks to Pål Westermark for patch)

itertools and iterators moved to suggests from imports so that plyr now only depends on base R.