[R-pkgs] New version of the LDheatmap package

[Sigal Blay]

Version 0.2 of the package LDheatmap is now on CRAN. The main function 
LDheatmap produces a graphical display, as a heat map, of measures of 
pairwise linkage disequilibria between SNPs. Users may optionally 
include the physical locations or genetic map distances of each SNP on 
the plot.

The revisions to the package are aimed at improving the user's ability 
to modify and annotate the heatmap. Most notably, LDheatmap is now based 
on grid graphics. Examples of how to modify the plot using tools from 
the grid package are included in the LDheatmap help file.

Sigal Blay