Update README.md

Increasing tolerance level of tests

Removing MASS package from suggested in DESCRIPTION file

Increasing tolerance level in tests

Upgrading to latest versions of repicea

Refactoring SIMEXGLM.R and adding performance test

Upgrading to repicea-1.7.1.jar

Implementation of the negative binomial regression in SIMEX

Bug #6 fixed

Upgrading to repicea 1.6.6

Allowing for factors in the SIMEXGLM function

Adding a predict function for SIMEXResult instance

Better formatting coef and vcov to have their results in a simular format to that of the glm function

There is longer any reference to a java.object in the SIMEXResult class

Upgrading to repicea-1.6.4.jar