addition of retrieveMatrix function to utilities.R
Addition of some features

retrieveMatrix, tsplot were added, proc.sanity was exported.
The dependency on batch was removed and a dependency on ggplot2 was
added.
Initial work on mtvsplot
Got the mvtsplot method working
Compatibility issue with R-3.1 patched

R-3.1 patched enforces that incomparables=NA cannot be used for
matching multiple columns, updated the code to reflect this.
Merge branch 'Working'