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.
Modify debug message
Change tex_cener key to tex_center
Merge pull request #35 from mgage/develop

Develop
Added first draft of a set of macros for statistics graphs.
Make Chromatic portable.

It requires a copy of gcc at /usr/bin/gcc.
It automatically compiles  pg/lib/chromatic/color from pg/lib/chromatic/color.c
Improve error messages.
Fix typo
Add contextComplexJ.pl for using jas the square root of -1
Change version to develop
Merge pull request #37 from mgage/develop

Make Chromatic portable.
Merge branch 'develop' of https://github.com/openwebwork/pg into develop
Add debug option to askSage
Merge pull request #39 from mgage/develop

Add debug option to askSage
Added the code to add a box plot for the data.