Bump DataFrames SHA1
Bump DataFrames SHA1
Update Calculus and Optim packages

Added the Calculus package, which contains finite-differencing functions
Updated the Optim package, which depends on the Calculus package
The Optim package now provides trace capabilities
Add Ito.jl package to Metadata
Merge pull request #47 from aviks/topic/Ito

Add Ito.jl package to Metadata
Bump DataFrames SHA1
Added package Rif
Merge pull request #48 from lgautier/master

Rif: An interface to R (embedded R)
Updated Calculus and Optim packages
Bump PatternDispatch