Tutorial Day 2 review

[martinberoiz]

• In Day 2, the tutorials are referencing the PyCBC modules web page. A more inclusive top level links is here, also note the User Guides on left side of page that may be particularly applicable.
• In Day 2, Tutorial 1,2,3 there are import pylab statements. According to matplotlib, direct input of pylab is 'strongly discouraged'. Given that the use of this python package seems to be working so far, if the change to use matplotlib.pylab is adopted, it should be rigorously tested. Also, the first time I imported pylab it took a long time, probably for some of the reasons noted in the matplotlib page above. DONE (see Remove pylab #35)

[duboism]

Part of this were fixed in #35.