Document basic IPython usage

[pericazivkovic]

• pylab (https://groups.google.com/forum/#!topic/portablepython/o4R5NmzkYc0)
• notebook (https://groups.google.com/forum/#!topic/portablepython/dqsWri5orII and https://groups.google.com/forum/#!topic/portablepython/x7fmVaoFHJE)

[Tcll]

just thought I'd point out, the included IPy version is 1.31.1 which has an issue, fixed in 1.31.2