Change log version 1.0 to 1.0.1

- Updated documentation on shift()
- Made shift() a generic with data.frame and vector methods
- Fixed require'd package loading
- Added ,drop=FALSE option to sort.data.frame

Change log version 1.0.1 to 1.0.2

- Added destring()
- Depricated roundnear()

Change log version 1.0.2 to 1.0.3

- Added reshapeasy(), a wrapper to make base R's reshape syntax sane
- Added japply() convenience function to only sapply certain columns
- Added stack.list(), a stack method for lists of data.frames
- Added cleanTurked(), a function to clean Amazon Mechanical Turk items
- Added an autoplot (ggplot2) method to plot microbenchmark results

