Added comments to the probability routines.
Added a new routine to generate a list of normally dist. random numbers.
Added routines associated with exponentially distributed random numbers.
Added a routine to calculate the five point summary.
Cleaned up the comments and added info about the optional parameter.
Added an additional method for calculating the five point summary. The new method includes the median in the calculation of Q1 and Q3 if the median is in the dataset.
Added first draft of a set of macros for statistics graphs.
Added the code to add a box plot for the data.
Added labels to the boxplots and adjusted the margins for the graph of the boxplots
Moved the random number generating routines to the statistics macro in order to preserve the use of the problem's seed.
Cleaned up the comments and added to them for completeness.
Added a routine in the graph macros to get the largest and smallest values in a data set. This allows the init graph to avoid using any sorts.
Fixed a problem with the positions of the ticks on the axes of a graph.
Removed a test string for a label that was inadvertantly left in.
Moved the axes positioning code out of an else to make sure all situations are captured.
Removed a line that reset the labels that are queued to print in a plot.
Shifted the labels on the axes for the graph macros.
Fixed a problem with the positioning of the labels on the axes.
Merge pull request #1 from openwebwork/develop

Merged the openwebwork/develop branch up to June 30.
Added first draft of code to make a histogram.