New R bundle based on R 3.1.2

Fixes #50
Transition to boost 1.54 for win 32-bit

Now we're building both x64 and x86 on windows with GCC 4.8.2, we can
use boost 1.54 for both
Linear Regression bug fix

This fixes a bug in creating the coefficients table when one or more of
the coefficients result in NA’s.
Update

Change in column names of Ancova code
fixes a bug

This fixes a bug I introduced yesterday with the name change in columns
from “p(M|Y)” to “P(M|data)”.